Crosman’s 2400KT carbine: Part 8

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 7

Today’s report is the culmination of a guest blog from reader HiveSeeker about his Crosman 2400KT.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Crosman 2400KT
The 2400KT CO2 carbine is available exclusively from the Crosman Custom Shop.

This report covers:

  • Accuracy for .22 caliber: Wows and boos
  • Benjamin Pointed Expanding pellets from the Ultimate Hunting Pellet Assortment (UHPA)
  • Air Arms Falcon pellets
  • The Crosman clan family reunion
  • Benjamin Discovery Hollow Point (UHPA) pellets
  • Crosman Premier Ultra Magnum pellets, Benjamin Discovery Domed Magnum (UHPA) pellets, and Crosman Premier Hollow Point pellets
  • Benjamin Discovery Hollow Point pellets (500-pellet tin)
  • .22 Crosman Premier pellets (boxed)
  • JSB Diabolo Exact Jumbo pellets (15.89 grains)
  • JSB Match Diabolo Exact Jumbo Monster pellets
  • RWS Meisterkugeln pellets
  • RWS Superdome pellets
  • Conclusion for .22 caliber

Accuracy for .22 caliber: Wows and boos

The accuracy test for the .22 HiveSeeker 2400KT with 18-inch Crosman barrel was also conducted from a bench rest at 10 yards, with 10-pellet groups measured center-to-center. You’ll see that a few of those gremlins are still alive and well, infesting my .22 pellet bin, too! As I did with the .177 pellets, I’ll list my accuracy results alphabetically. Space will again limit our discussion to only the very best pellets — with one notable exception that we’ll address first!

Benjamin Pointed Expanding pellets from the Ultimate Hunting Pellet Assortment (UHPA)

I’d already spent a fair amount of quality time with this gun before I finally settled down for some serious accuracy testing. I thought I had a pretty good idea what to expect. The Benjamin Pointed Expanding (Destroyer style) pellet from the Ultimate Hunting Pellet Assortment (UHPA) was one of the few I hadn’t already tried, so I started my official accuracy testing with it — just out of curiosity. Then, something went wrong with my pistol! Pellets were flying all over the target! Was my barrel loose? Had my scope lost its zero? I immediately tried a previously accurate pellet and everything returned to normal. Nope — the 2400KT just does not like the Benjamin Pointed Expanding pellet one bit! It made a huge 2.353-inch group — the worst we’ll see — and repeat testing was almost as bad. This was a confidence-shaking experience! Thankfully, though, this gun got along much better with nearly every other pellet tested.

Crosman 2400KT .22 Benjamin Pointed Expanding
Benjamin Pointed Expanding pellets from the Ultimate Hunting Pellet Assortment (UHPA) scatter like flushed quail! I have a hard time believing that this 2.353-inch group came out of the same barrel as the next group. The Pointed Expanding UHPA is not a pellet for the 2400KT! I’m continuing to show you my targets placed over a contrasting color background to highlight the groupings.

Air Arms Falcon pellets

The Air Arms Falcon was the pellet that got us off to such a great start in the .177 2400KT. Could I hope for a repeat performance? Why, yes I could! Ten Air Arms Falcons went into a reasonable 0.390-inch group, but there was a gremlin in the bunch! The 9 well-behaved members of that group huddled tightly together in 0.178 inches center-to-center. A second group I shot clustered all 10 pellets in 0.265 inches. Very, very nice!

Crosman 2400KT .Air Arms Falcon
The Air Arms Falcon does very well in either caliber in the Crosman 2400KT! This group measures 0.390 inches center-to-center, but 9 pellets squeezed into 0.178 inches! This is very good!

Crosman 2400KT .Air Arms Falcon tin
I also just had to show you that humongous Air Arms Falcon tin, which dwarfs everything else in my pellet bin! (Know that I’ve got big hands!)

The Crosman clan family reunion

You’ll recall that these six pellets are very similar. Except for domes or hollow points, they’re identical in nearly every way, including weight (14.3 grains). They also performed almost identically when we looked at velocity, except for the slightly slower Benjamin Discovery Hollow Point UHPA. Accuracy for this group ranged from 0.521 to 0.949 inches and averaged a mediocre 0.750 inches. Note that the boxed Crosman Premier is a new addition to the stable since the velocity testing — and the only one for which I’ll actually show you a target.

Benjamin Discovery Hollow Point (UHPA) pellets

The Benjamin Discovery Hollow Point UHPA was slightly slower than the rest of the Crosman clan when we tested velocity, and it put 10 pellets in 0.949 inches — the worst of the family. This pellet is now the real black sheep of the Crosman clan, as the slowest and least accurate of the entire bunch, with the lowest muzzle energy as well.

Crosman Premier Ultra Magnum pellets, Benjamin Discovery Domed Magnum (UHPA) pellets, and Crosman Premier Hollow Point pellets

Accuracy was equally poor among the Crosman Premier Ultra Magnum, Benjamin Discovery Domed Magnum (UHPA), and Crosman Premier Hollowpoint, ranging from 0.803 to 0.831 inches. No redeeming of the family honor here, but at least these members of the Crosman clan stick together!

Benjamin Discovery Hollow Point pellets (500-pellet tin)

There was a glimmer of hope in the 0.573-inch group from the Benjamin Discovery Hollowpoint (500/tin), but that’s still not enough to clear the family name.

.22 Crosman Premier pellets (boxed)

Despite the mediocre accuracy I’d already seen from the rest of the Crosman clan, I had very high expectations for the boxed .22 Crosman Premiers. This popular pellet is another of B.B.’s staples, and I hoped it would perform as well in the 2400KT .22 as its absolutely amazing little brother did in the 2400KT .177. Alas, it was not to be. Ten pellets went into 0.521 inches center-to-center. However, I’ll re-test this favorite at 20 yards to see if ballistics tighten the group at that range. Despite my disappointment, the boxed Premier was nevertheless the best of the Crosman clan. Although B.B. and I both thought that the Crosman Premier Ultra Magnum and Benjamin Discovery Domed Magnum (UHPA) were identical to these boxed Crosman Premiers, the boxed Premiers shot noticeably better.

Crosman 2400KT Crosman Premier boxed
This is the only Crosman clan group that I’m going to show you. The boxed Crosman Premier was the best of the bunch at 0.521 inches.

During the Crosman clan velocity testing, I noticed that the domed pellets had much wider velocity spreads than the hollow points. I speculated that accuracy might be better with the more consistent hollow points. However, the average group size of the domed pellets (0.725 inches) was essentially the same as the hollow points (0.775 inches). Overall, the two pellet types appear to perform identically.

In summarizing the Crosman clan, I have to say that, for a Crosman airgun, the 2400KT doesn’t particularly like .22 Crosman pellets. Thankfully, the variety of imports available provide some very nice alternatives that indeed showcase what a fine little carbine Crosman can put together for you.

JSB Diabolo Exact Jumbo pellets (15.89 grains)

Wow! This is what I’ve been hungering for since those Air Arms Falcons! Ten JSB Diabolo Exact Jumbos (15.89 grains) made a single 0.266-inch hole. Sweet! More testing resulted in slightly larger groups, but this pellet is a definite keeper.

Crosman 2400KT 22 JSB Diabolo Exact Jumbo
I wish we were seeing more good groups up to this point, but the 15.89-grain JSB Diabolo Exact Jumbo fills the bill at 0.266 inches!

JSB Match Diabolo Exact Jumbo Monster pellets

I’m only going to mention the JSB Match Diabolo Exact Jumbo Monster because it had the highest muzzle energy. I had hoped that the very low velocity spread on this giant pellet would result in decent accuracy, but performance was middle-of-the-line at 0.413 inches. However, assuming a manageable trajectory, that group size should put this high-energy hitter within a 1-inch vital zone out to 20 yards.

RWS Meisterkugeln pellets

Here’s another keeper! The RWS Meisterkugeln was one of my earliest .22 ammo purchases. As a result, I shot more groups with this one than any other. My best group was 0.313 inches, with most of the remainder under 0.400 inches. I’ll definitely be buying more!

Crosman 2400KT .22 RWS Meisterkugeln
This may look like a 3-shot group, but it’s not a 3-shot group! It is a 10-shot group! Ten pellets went into 0.313 inches center-to-center. Not bad! This was consistently one of the best pellets for this gun.

RWS Superdome pellets

All’s well that ends well! The very popular RWS Superdome did just fine in the 2400KT: 0.297 inches, center-to-center. That’s tight! I have high expectations for the 20-yard test as well. This gives us a very nice wrap-up to the Crosman 2400KT .22 accuracy test.

Crosman 2400KT .22 RWS Superdome
A thumbtack measures 0.44 inches across. This group measures 0.297 inches, center-to-center. That makes this gun a tack-driver with the RWS Superdome!

Below is a summary table of all my accuracy results with the .22 HiveSeeker. There were a lot fewer gremlins in these pellets so I did not list the best 9-in-10.

Crosman 2400KT .22 accuracy table
Accuracy results from 20 different pellets tested in the .22 2400KT with 18-inch Crosman barrel. Nine (45%) grouped under half an inch. There were fewer gremlins in this group so I did not list the best 9-in-10.

Conclusion for .22 caliber

As you might expect, accuracy with the .22 Crosman barrel was not as good as the .177 Lothar Walther match barrel costing four times as much. There were also fewer .22 pellets that did well in this gun. However, nearly half of them grouped under half an inch, and several grouped just over a quarter inch — not bad at all! While shooters may need to test a wider variety of pellets to find those that perform well in the .22 Crosman 2400KT, I’d still rate this gun very good in accuracy, especially among the limited number of other non-PCP .22 pistols available. In conclusion, if you’re looking for the power of a bigger spring-piston pistol and the accuracy and low recoil of a CO2 or pneumatic, you should consider the .22 Crosman 2400KT.

Can the Crosman 2400KT keep it together at 20 yards? I’ll address that topic in the comments to this part of my report.

Crosman’s 2400KT Carbine: Part 7

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3
Part 4
Part 5
Part 6
Part 8

Today’s report is the continuation of a guest blog from blog reader HiveSeeker about his Crosman 2400KT.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Crosman 2400KT
The 2400KT CO2 carbine is available exclusively from the Crosman Custom Shop.

This report covers:

  • Gremlins!
  • .177 accuracy — Wow!
  • Air Arms Falcon pellets
  • Crosman Premier light pellets (boxed)
  • Gamo Tomahawk pellets
  • H&N Field Target Trophy pellets
  • H&N Finale Match Pistol pellets
  • RWS Hobby pellets
  • RWS Superdome pellets
  • Scope swap
  • .177 conclusion

In my earliest airgunning days, despite being a novice shooter of only 14, I had a remarkable revelation one day. After spending countless hours with my beloved Crosman 760, it hit me: I could actually shoot better than my gun! I’d reached the point where no amount of practice would improve my groups with the equipment I had. Today, I’m pleased that I’ve graduated to owning a few guns that put me on the better side of those tracks, and the Crosman 2400KT is one of them.

When I wrote the blog on the Winchester MP4, I shot at least three groups with every pellet tested. This turned out to be a lot of work and also resulted in charges (never proven) that I was turning my wife into something she called a “blog widow”! With two guns to test in this report, time limitations didn’t make a repeat performance possible. I tested each pellet at least once from a bench rest using10-shot groups at 10 yards. Pellets that showed promise received further testing, with the best promoted to the 20-yard test.


Did you know that at the beginning of World War II, the United States Air Force had only 800 airplanes? And as the specter of world domination, and finally Pearl Harbor, thrust our nation into an era of unprecedented industrialism and engineering, something odd cropped up in that burgeoning Air Force: Gremlins! These gremlins were intermittent mechanical problems in aircraft that the engineers just couldn’t pin down, and they became legend among the pilots and crews of that era. Why am I telling you this? Because great-great-grand-gremlins have taken up residence in my pellet bin. My two Crosman 2400KTs shoot very well most of the time. But a frustrating number of my groups have a single renegade pellet that insists on thinking outside the box, really opening up its group. Much like their World War II ancestors, there seems to be no rhyme or reason as to when one of my pellet gremlins will show up. Sit back and observe!

.177 accuracy — Wow!

My eyesight’s still pretty good; but as I started measuring my group sizes, I found it helpful to lay the target over a colored sheet of paper that contrasted sharply with both the white target background and the black bulls-eye. This proved especially helpful with those Raggedy Ann domed pellet groups. As unmanly as it may sound, hot pink worked best! I decided to take my accuracy photos the same way to show you what I’m talking about.

There were several different ways I could have arranged my results for accuracy testing the wife’s .177 Sassy Sandy 2400KT with a 10.1-inch Lothar Walther barrel. Ultimately, an alphabetical arrangement of the pellets seemed the most organized — even though you’ll get the happy ending of this story right at the very beginning. With so many different pellets tested, we’ll concentrate on only the best performers.

Air Arms Falcon pellets

The Air Arms Falcon will get us off to a fine start with the .177 2400KT but will also spill the beans on accuracy in this gun. This pellet is one of B.B.’s standbys because it performs well in a variety of guns, and the Falcon does not disappoint here: 10 pellets went into 0.254 inches center-to-center. A pencil eraser’s width at 10 yards — very, very nice!

Air Arms Falcon target
Ten Air Arms Falcons all squeezed into 0.254 inches center-to-center at 10 yards. We’re just getting started, and the cat’s already out of the bag: The Crosman 2400KT with the .177 Lothar Walther barrel can shoot! Here you also see how a contrasting color background made the groups pop.

Crosman Premier light pellets (boxed)

If B.B. has a standard .177 pellet, the boxed Crosman Premier Light is it. Ten went into 0.302 inches thanks to a single gremlin pellet at the top left of this group, but look closer: 9 went into 0.162 inches center-to-center. Wow! That’s less than a single pellet diameter and as good as we’ll see from this gun! This is one pellet that definitely makes this pistol shoot better than I can.

boxed Crosman Premier Light target
Wow! I think I just discovered why B.B. is so fond of these: 10 Crosman Premier Lights in .302 inches, which is not bad, but 9 went into 0.162 inches. That’s really, really tight!

Gamo Tomahawk pellets

The economy-class Gamo Tomahawk really surprised me! A single gremlin made this group 0.530 inches big, but the other 9 pellets went into an itty-bitty 0.277-inch hole.

Gamo Tomahawk target
Yet another gremlin spoils an otherwise excellent group. Overall size is 0.530 inches, but 9 well-behaved pellets stayed inside 0.277 inches! Sweet!

H&N Field Target Trophy pellets

The 2400KT liked the H&N Field Target Trophy pellets better than the H&N Barracuda Match, which I won’t show you here). Both pellets came from the same H&N Field Target Sampler pack. My group was 0.329 inches for the 4.50mm head size, and 0.246 inches for the 4.51mm head size — both very nice! The 4.52mm pellets shot widest at 0.368 inches. From my testing of all head sizes for both the FTT and Barracuda Match, I’d say that, overall, the 2400KT seems to prefer the smaller heads — perhaps, due to that choked barrel.

H&N Field Target Trophy target
The best of the H&N Field Target Trophy — 0.246 inches for the 4.51mm head size. The 2400KT likes the FTT!

H&N Finale Match Pistol pellets

I shot two groups with the H&N Finale Match Pistol, with the first measuring 0.351 inches overall; and the second measuring larger at 0.426 inches, but with 9 shots landing inside of 0.278 inches. A group that small 90% of the time isn’t bad!

H&N Finale Match target
This group of H&N Finale Match Pistol measures 0.426 inches, but 9 pellets fit into 0.278 inches. Curse you, gremlin!

RWS Hobby pellets

Gremlins get into another one of B.B.’s favorites! Ten RWS Hobbys went into a respectable 0.347 inches, but 9 are in one itty-bitty 0.173-inch hole! This one’s a keeper!

RWS Hobby target
The RWS Hobby shoots better than I can! Ten pellets make a decently small group at 0.347 inches; but if you ignore that gremlin to the lower right, and you can see that 9 fit into 0.173 inches center-to-center! That’s less than a single pellet diameter . . . I’m duly impressed!

RWS Superdome pellets

A popular field target pellet, the RWS Superdome, does very well here at 0.300 inches even.

RWS Superdome target
This group measures exactly 0.300 inches wide. Wrap it up — I’ll take it!

Below is a summary table of all my accuracy results with the .177 Sassy Sandy. While most pellets shot well, space limited today’s discussion to only the cream of the crop.

Crosman 2400KT accuracy table
Accuracy results from 24 different pellets tested in the .177 2400KT with 10.1-inch Lothar Walther match barrel. Eighteen (75%) grouped under half an inch. There were a number of gremlins in these groups, so where applicable I listed the best 9-in-10.

*Best 8-in-10.

Scope swap

You’ll remember from part 1 that I was using a CV Life 3-9×40 economy scope that had already served me well on a couple other airguns. This was just a temporary measure until I could finance some better glass — specifically something with a parallax-reducing adjustable objective. I was looking for something close to the same weight to keep this gun as light as possible for my wife (the Sassy Sandy’s namesake). The lightest scope whose reviews I liked turned out to be the Hawke Sport HD 3-9×40 AO at 16 oz.

Hawke scope
Here’s the Sassy Sandy sporting her new Hawke Sport HD 3-9×40 AO scope!

I hoped for a significant improvement in group size. However, for 15 different pellets, the CV Life groups averaged 0.578 inches, while the Hawke groups averaged 0.429 inches — an improvement of only 0.149 inches (26%) at 10 yards. Apparently, parallax was not as much of an issue with the CV Life scope as I’d feared. Note that out of those 15 pellets, however, the Hawke generated the smallest group for 12 of them — so it definitely makes a difference. Another big bonus with the Hawke was having my target in sharp focus instead of blurry, as it was with the CV Life — even at a low 3x.

scope comparison graph
Remember — smaller numbers are better! The Hawke Sport HD 3-9×40 AO shot smaller groups than the CV Life 3-9×40 for all but 3 of the 15 pellets tested (marked by arrows). Average group size was 0.429 inches for the Hawke and 0.578 inches for the CV Life.

.177 conclusion

As you can see, the Crosman 2400KT liked nearly every pellet I fed it. The choked Lothar Walther barrel does seem to help keep those groups nice and tight! Performance here was as good as what B.B. found when he tested the very similar Crosman 2300T and 2300S CO2 match pistols at 15 yards. My concluding statement for the 2400KT .177 accuracy test is: “Wow!” In addition to the power of this CO2 pistol in .22, the accuracy of this fine little carbine in .177 is the other most significant thing I have to report about the Crosman 2400KT.

Editor’s note: HiveSeeker’s report goes on to report his findings for his .22-caliber 2400KT, but the report is so long that I’m saving that part for another day. That one will end this series.

Crosman’s 2400KT carbine: Part 6

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3
Part 4
Part 5
Part 7
Part 8

Today’s report is the continuation of a guest blog from reader HiveSeeker about his Crosman 2400KT.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Crosman 2400 KT
The 2400KT CO2 carbine is available exclusively from the Crosman Custom Shop.

This report covers:

  • Velocity .22 — Wow!
  • Crosman SSP pellets
  • RWS Hobby pellets
  • The Crosman clan
  • Benjamin Discovery domed magnum pellets
  • Benjamin Discovery hollow point pellets
  • Beeman Kodiak pellets
  • JSB Match Exact Jumbo Monster pellets
  • Noise
  • The most powerful non-PCP air pistols
  • More muzzle energy!
  • B.B.’s Crosman 2240 conversion to air

Velocity .22 — Wow!

Our shots-per-fill and .177 velocity discussion have already tipped my hand — the Crosman 2400KT is a powerhouse CO2 pistol in .22! That’s one of the most important things I have to report in this blog.

I was hoping for velocities over 500 fps in my HiveSeeker .22, and that was what I got with almost everything I tested. The 2400KT posted an average velocity of 573 fps with the middleweight 14.3-grain Benjamin domed magnum. Velocities ranged from 673 fps with the 9.5-grain alloy Crosman SSP, down to 451 fps with the aptly-named 25.39-grain JSB Exact Jumbo Monster. I had definitely attained what I wanted in the velocity department! Go ahead and take a look:

Crosman 2400 KT 22 velocity table
1. B.B. reports that this pellet is identical to the boxed Crosman Premier, with the possible exception of single-die production.
2. B.B. reports that this pellet is identical to the boxed Crosman Premier. From the Benjamin Ultimate Hunting Pellet Assortment (UHPA).
3. From the 500-pellet tin (BHP22).
4. From UHPA.

As with the .177 pellets, I won’t be repeating specific velocities much in the ensuing discussion — you can get that from the above table. Below are some individual comments on only the most interesting of the various pellets tested.

Crosman 2400 KT 22 pellets
Since I want to use the .22 HiveSeeker 2400KT for light small game hunting and pest control, I tested an even wider assortment of pellets to fully evaluate this pistol’s capabilities and potential.

Crosman SSP pellets

I think that 673 fps in any non-PCP .22 pistol is noteworthy — even with an alloy pellet. This was the only loose-fitting pellet of the bunch. It was by far the loudest of all the .22s tested, and louder in this caliber than its little brother was in .177.

RWS Hobby pellets

Another lightweight, the RWS Hobby, posted an average velocity just over the mark at 609 fps — not bad for lead in a .22 CO2 pistol!

The Crosman clan

These five pellets are very similar, and I’ll only comment on two of them. Except for domed or hollow point, they’re identical in nearly every way including weight (14.3 grains). They also performed similarly, except for the rebel of the family, the Benjamin Discovery hollowpoint from the Ultimate Hunting Pellet Assortment (hereafter UHPA). All five pellets (except that Benjamin hollow point UHPA) had average velocities that fell within 5 fps of each other. This is a real testament to Crosman quality control and manufacturing!

Crosman 2400 KT the Crosman clan
Meet the Crosmans! Can you tell the difference? I can’t without a scorecard! From left to right: Crosman Premier ultra magnum, Benjamin Discovery domed magnum (UHPA), Crosman Premier hollow point, Benjamin Discovery hollow point (500-pellet tin BHP22), and Benjamin Discovery hollow point (UHPA).

Benjamin Discovery domed magnum (UHPA) pellets

You’ll recall that this was the representative pellet I chose for the extended shots-per-fill test. When I averaged all the Crosman clan velocities (except the Benjamin hollow point UHPA), the average was 573 fps — exactly what the Benjamin domed magnum scored. So, yes, it does seem to be a very good representative for the group. Muzzle energy was 10.43 ft-lbs.

Benjamin Discovery hollow point (UHPA) pellets

This was the black sheep of the Crosman clan. I actually chronographed it twice because I thought the first test might have been a fluke. It wasn’t. The pellet posted an average velocity of 558 fps. This is only 15 fps lower than the rest of the Crosman clan — not a lot, really — but compared to its tight-knit siblings, this pellet stood apart. This 15 fps makes it stand apart from the pack even more in terms of muzzle energy, at about a half foot-pound less than all the other 14.3-grain Crosman pellets tested here.

Beeman Kodiak pellets

The Beeman Kodiak heavyweight dropped the 2400KT under 500 fps — but at 487 fps, not by much. Spread was tight at 11 fps, and I hope this will translate to consistent downrange accuracy for this slower pellet, especially since this one is traditionally a good hunter. This heavyweight also broke the 11 ft-lb mark in terms of muzzle energy.

JSB Match Exact Jumbo Monster pellets

This pellet is well-named — it’s huge! After fighting to load so many other tipping and flipping pellets in that notorious Crosman breech, it was sheer pleasure loading these big, easy beer cans! At 451, fps this was the slowest pellet, but it also had the only single-digit velocity spread in .177 or .22 — 9 fps. I hope that portends good, repeatable field accuracy for this potential hunter, because it generated the highest muzzle energy of all the other pellets at 11.47 ft-lbs.

Crosman 2400 KT JSB Jumbo Monster
I just had to show you this one! These jumbo beer cans were so easy to load. I’m hoping that the small 9 fps spread means that slow and steady does the job for downrange hunting accuracy.

In summarizing velocity performance for the unmodified .22 caliber 2400KT, all I can say is “Wow!” I was expecting velocities of at least 500 fps out of the box, but this fine little carbine has surpassed all my expectations.


As already mentioned for both calibers, some of the faster pellets were noticeably louder. However, the 18-inch .22 barrel really did seem to lessen the sound level compared to the 10.1-inch .177 barrel. (The very loud .22 Crosman SSP was a noisy exception.) Overall, I would rate the noise to be medium for the .22, and medium to medium-high for the .177. The longer-barreled .22 is definitely more neighborhood-friendly.

The most powerful non-PCP air pistols

In Part 1, I was initially looking at several powerful non-PCP pistols as candidates for my next purchase. When my chronograph started spitting out velocities even higher than I’d hoped for, it prompted me to go back and see how the HiveSeeker 2400KT stacks up against some of those earlier .22 contenders.

My previous finalist was the Browning 800 Express. This pistol posted 441 fps with the Crosman Premier when B.B.’s friend Mac tested the .22 version (Browning 800 Mag — Part 5). I was astonished to discover that the 2400KT was besting “the most powerful spring-piston handgun made” by 130 fps! To be fair, Mac found that this pellet was not a good one for the Browning, and the Express came within 70 fps of the 2400KT with both the RWS Hobby and RWS Superdome. A longer barrel — as we discussed in Part 5 — definitely provides an advantage for the 2400KT. But 70 fps is still a respectable lead!

Though no longer commercially available, the Crosman Outdoorsman 2250XE came closest to the 2400KT in off-the-shelf performance, following only about 25 fps behind with three different pellets (see Crosman Outdoorsman 2250XE: Part 2). I suspect this former Crosman Custom Shop offering is almost identical to my HiveSeeker in powerplant construction.

I also compared the 2400KT’s nearest living (commercially available) relative, the Crosman 2240. The 2400KT surpasses that popular gun by about 120 fps for every pellet tested (Crosman’s 2240 pistol: Part 2).

The table below summarizes some of these .22 air pistol comparisons. If you’re in the market for a powerful .22 pistol but aren’t ready to move up to a PCP, most of the commercially available options will be on this list.

Crosman 2400 KT velocity comparison table
Comparison table of velocities with different pellets for some of the most powerful .22 non-PCP pistols. All data except for Crosman 2400KT is from B.B.’s blog entries unless noted.

1. Pyramyd Air tech shop testing.
2. The Premier tested in the Crosman 2400KT was the Crosman Premier ultra magnum from the 500-pellet tin (LDP22).
3. The Crosman Premier and Beeman Kodiak would not fit in the breech of the Hatsan 25 Supercharger and could not be tested.
4. From the Benjamin Ultimate Hunting Pellet Assortment (UHPA).
5. From the 500-pellet tin (BHP22).

I’d already included barrel length in the table above for the barrel-length-and-velocity discussion, which we covered in Part 5. Some of these stock guns have barrels half the size of the 18-inch HiveSeeker’s; but even if the 2400KT is only faster than its colleagues because of its barrel length, it’s still among the fastest non-PCP .22 pistols you can buy.

Of course, velocity wasn’t the only factor I was interested in. A number of these other pistols, particularly the Browning 800 Express and Webley Alecto Ultra, require very high cocking or pumping effort. My arms, which were begging for a vacation from such calisthenics in Part 1, are happy with my new purchase. The Crosman 2400KT is one power-packed — and easy to use — .22 pistol!

More muzzle energy!

Now that we’ve examined velocity, there are two reasons I want to take a closer look at muzzle energy. First, I’d like to take the HiveSeeker small game hunting. Is it powerful enough for the job? Most modern sources recommend that a hunting airgun post a lower limit of 12 ft-lbs of energy at the muzzle (Hunting with airguns). As you can see from our first velocity table above, the stock 2400KT falls shy of that 12-foot-pound recommendation.

Second, you’ll remember that my 2400KT is replacing my old Crosman 1377, which is now in airgun heaven. As technology has advanced, the standard for a hunting pistol has also kept pace. Pistols that used to be considered competent hunters — like the 1377 — no longer make the grade. So, how much more powerful is my new pistol?

Right about the time I started working on this blog, B.B. posted the vintage BSA Scorpion pistol (BSA Scorpion air pistol — Parts 1 and 2). He included the BSF S20 Match pistol and the Webley Hurricane, mentioning that “in their day, these 3 were considered to be the most powerful air pistols around.” How would they stack up today? Well, that blog mentioned the Beeman P1; and before I knew it, I was tracking down data on many of the historically powerful air pistols!

The table below compares muzzle energy for a number of the more powerful modern and historical non-PCP air pistols. As we saw above, muzzle energy can vary with the same gun. In making my comparison, I tried to stay as close as possible to the Crosman Premier Light in .177 (7.9 grains), and Crosman Premier in .22 (14.3 grains). These are both middleweight pellets in their respective calibers, and they should provide a good representative measure. Where those pellets weren’t used, I chose the closest-weight match.

Crosman 2400 KT muzzle energy comparison table
Comparison table of muzzle energy for some of the most powerful historical and modern non-PCP air pistols. All data except for Crosman 2400KT is from B.B.’s blog entries unless noted.

1. The Crosman Premier was also tested but found to be a poor performer in the Browning 800 Express.
2. Pyramyd Air tech shop testing.

As you can see, the HiveSeeker .22 is more than twice as powerful as my old .177 Crosman 1377, with a muzzle energy of 10.36 foot-pounds compared to 4.65 foot-pounds. That’s definitely more punch! You can also see that .22 airguns tend to have higher muzzle energy than .177s, as in the cases of the dual-caliber Browning 800 Express (1.00 ft-lb difference) and Webley Alecto (1.11 ft-lb difference). The difference between calibers is much wider in the 2400KT, at 4.68 foot-pounds (though with the barrel length difference we’ve already discussed). This wide gap again indicates that the 2400KT in .177 is aimed at something other than maximum velocity; nevertheless, the .177 2400KT still places in the middle of the table, with the yesteryear power trio in B.B.’s BSA Scorpion blog retired to the bottom of the list. Times have changed!

B.B.’s Crosman 2240 conversion to air

You’ll recall that the direction this blog has taken arose in part from a comment that fellow reader G&G posted to B.B.’s Crosman 2240 conversion to air: “I will want to see just how close it comes to being the same as an existing gun you could just purchase.” We’ll finally attempt to answer that question now.

I included B.B.’s modified 2240 in the comparison tables above, even though their main purpose is to compare non-PCP pistols. B.B.’s modifications included the PowerMax HiPAC PCP conversion kit filled to 2250 psi, a new striker spring, steel breech and Crosman 14.5-inch barrel. This setup beat the HiveSeeker by 31 fps with the RWS Hobby, and by only 17 or 18 fps with the Crosman Premier and RWS Superdome. I would say that’s fairly close, but B.B. was only using a 14.5-inch barrel. Our previous discussion in Part 5 shows that he could widen that velocity gap even more with a longer barrel. So, in answer to our original question, the 2400KT approaches the velocities B.B. generated with his HiPAC conversion, but can’t match them — especially if more modding continues.

The Crosman 2400KT still represents an impressive value. For less than the cost of just some of B.B.’s upgrades — not even including the price of the base pistol itself — you get an adjustable-trigger carbine that nears the performance of a 2240 converted to air with a steel breech, longer barrel, and striker spring upgrade. This tells me that Crosman really knows what it’s doing with this pistol. But even if you like to mod, the 2400KT provides a very price-friendly starting point — with a lot of the modding already done for you!

Well, we’ve seen that this pistol can shoot fast. But does it shoot fair? B.B. likes Colonel Townsend Whelen’s quote, “Only accurate guns are interesting.” I’m coming to like that quote more and more, too. In Part 7, we’ll finally decide how interesting the Crosman 2400KT really is!

Crosman’s 2400KT carbine: Part 5

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3
Part 4
Part 6
Part 7
Part 8

Today’s report is the continuation of a guest blog from reader HiveSeeker about his Crosman 2400KT.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Crosman 2400 KT
The 2400KT CO2 carbine is available exclusively from the Crosman Custom Shop.

This report covers:

• A reminder of the two guns
• Barrel length and velocity
• Can you help? Part 2
• New thoughts on barrel length

Part 5 was going to be the Crosman 2400KT .22 velocity test. However, I’d already reported that this gun delivers almost identical velocities in both .177 and .22. When I stated in Part 4 that barrel length alone does not appear to account for this, a number of questions came up. I’d already researched this and knew why I had drawn that conclusion; but without that information, some blog readers had questions. So, let’s jump ahead to what I had already put together about barrel length and its relationship to velocity before moving on.

A reminder of the two guns

Crosman 2400 KT Sassy Sandy
The Sassy Sandy is a target carbine in .177 with 10.10-inch Lothar Walther choked match barrel, black custom shoulder stock, black trigger shoe and black muzzlebrake.

Crosman 2400 KT HiveSeeker
The HiveSeeker is a light-duty small game and pest hunter in .22 with 18-inch barrel, simulated carbon fiber custom shoulder stock, black trigger shoe and black muzzlebrake.

Barrel length and velocity
We’ve mentioned barrel length a couple times already, and we’ll finally address that topic here. A longer barrel means higher velocity because the CO2 has a longer distance over which it can exert pressure on the pellet, generating more speed. We’ve already discussed the .177 Sassy Sandy and .22 HiveSeeker having the same velocity, but that statement is only partly true. With an 18-inch barrel close to twice the length of the 10.10-inch Lothar Walther barrel, the HiveSeeker has a decided advantage. How much? Let’s see if we can find out.

Although I couldn’t get a word out of Crosman on Custom Shop gun velocities, one of their customer service reps did tell me that the velocity difference across all the available barrel lengths was about 50 fps. In my research, I came across B.B.’s blog, How barrel length affects velocity in a CO2 rifle, which showed almost exactly the same result. There, B.B. tested a Quackenbush XL rifle with a removable 7-oz. CO2 reservoir. It started off with a .22-caliber, 20.125-inch Crosman 2200 pneumatic barrel. B.B. cut down that barrel in 1-inch increments as he conducted his test. You’ll want to check out that blog for yourself, but below is B.B.’s velocity table, reproduced with his permission.

I’ve reversed the order of the original table to show velocity gain as the barrel gets longer, rather than velocity loss as the barrel was cut down. Problems cropped up when the barrel was cut down below 13 inches, so the comparison had to stop there.

Crosman 2400 KT barrel length vs velocity
Velocity increases with barrel length — up to a point. This table is modified from B.B.’s blog, “How barrel length affects velocity in a CO2 rifle.” The data is presented in the reverse of how B.B. presented it. Data is from a Quackenbush XL rifle with a removable 7-oz. CO2 reservoir and .22-caliber, 20.125-inch Crosman 2200 pneumatic barrel.

As you can see, velocity increases with barrel length up to 19 inches, and the maximum increase is 52 fps — just what Crosman Customer Service told me.

But at 20 inches, velocity drops. Once the CO2 has expanded inside the barrel and is no longer under enough pressure to push the pellet faster, friction takes over and the pellet begins slowing down. Further digging revealed the following from one of B.B.’s earliest blogs on the Crosman 2240: “According to tests I ran [on the 2240] with The Airgun Letter, a 24-inch barrel will slow the pellet back down to about where the 10-inch barrel is. A 16-inch barrel would be ideal, and you might see over 500 fps from a stock valve.” (Crosman’s 2240: Are we having fun, yet?) When Rick Eutsler sent B.B. the HiPAC kit for his Crosman 2240 conversion to air, he told B.B. that the 14.50-inch barrel would be the optimum length.

A somewhat longer barrel also seems to perform well, as I found with my 2400KT — though I think a different factory valve may also be helping. You’ll recall that the Crosman Outdoorsman 2250XE also happens to have an 18-inch barrel. When B.B. tested that particular gun, he said, “First, because it has an 18-inch barrel instead of just a 10-inch barrel, you get optimum performance from each CO2 cartridge. However, there’s a point of diminishing returns, which happens to be somewhere around 16 and 18 inches of barrel. After that, the pellet loses some velocity from friction. So, the barrel length on this carbine is anything but an afterthought!” (Crosman Outdoorsman 2250XE_Part 1). In the barrel-length-and-velocity blog, Crosman confirmed that 18 inches was optimum for a 2250. B.B. also concluded that 14 inches would probably be the optimal limit for a CO2 .177 barrel.

To summarize, all my data indicates that the 18-inch barrel is giving the HiveSeeker .22 about a 50 fps advantage over the 10.10-inch barrel on the Sassy Sandy .177. This isn’t enough to explain why the .177 has the same velocity as the .22.

Can you help? Part 2
What you just read was written as Part 6, almost verbatim. At this point, I was planning to discuss the different 2400KT stock velocities contributed by the blog readers and, perhaps, draw some more concrete conclusions about .177 and .22 velocities in this gun. I’d already scoured several Crosman modding forums before starting this blog; but while modded velocity data abounded, the stock velocity data was scarce and contradictory. I would still like comparative stock velocities for the 2400KT. If you can supply it, please remember to mention barrel length and pellet weight. If you’re actually throwing your gun back on the chronograph, please use pellets close to 7.9 grains in .177 and 14.3 grains in .22. Thanks in advance!

New thoughts on barrel length
Part 4’s comments made me do more thinking about why I got similar velocities in the .177 and .22 2400KT. Barrel length is a major factor. But with both the manufacturer and actual field testing indicating that the maximum velocity spread for a CO2 gun is about 50 fps across all barrel lengths, a longer barrel is simply not enough to make a .22 shoot just as fast as a .177. When we compared the Browning 800 Express, we saw a velocity difference of more than 200 fps between .177 and .22. I won’t compare a springer to a CO2 gun any further here, but I definitely expect a .177 to shoot a lot more than 50 fps faster than a .22! If that’s as much velocity as can be accounted for by a longer barrel, I’m forced to conclude that something more is going on with the 2400KT.

I already mentioned that, when looking at the Crosman Outdoorsman 2250XE, B.B. commented that a 14-inch barrel would probably be the optimal limit for a .177 CO2 gun. If that’s true, then velocity would start to fall off with a .177 barrel longer than 14 inches. The maximum velocity increase would be limited to only about 4 inches of added barrel length — not 8 inches — for the 10.10-inch .177 barrel. In other words, the 8-inch disparity in barrel length between my .177 and .22 2400KTs may be making even less of a difference than the 50 fps we’ve attributed to it so far.

The question remains: What’s going on with that .177? Blog reader Buldawg76 mentioned one fact I hadn’t considered — that the .177 Lothar Walther is a choked barrel. I already knew that, but didn’t consider the possibility that choking might actually slow down the pellet — dropping velocity a little closer to what I might expect from a .22. That’s one possibility that a comparison with the standard (unchoked) 10.10-inch Crosman .177 barrel might confirm. A related possibility I’d already considered was that Crosman might assemble differently a pistol ordered with the Lothar Walther barrel, perhaps with a different valve, in order to create a match gun with optimally stable (and also lower) pellet velocity. Again, someone with stock 2400KT velocities from a shorter .177 Crosman barrel might be able to provide an answer.

Before we wrap up today’s blog, I’d like to note that most of the questions that arose from Part 4 were related to much higher barrel-length velocity increases on modded guns. I’ll simply state that a CO2 2400 that’s been converted to air, valve-swapped, and then pressurized to 3,000 psi is no longer a CO2 2400. Please feel free to share your modded velocity data. For direct comparison to the unmodified Crosman 2400KT CO2 Carbine that’s the topic of this blog, please stay with similarly unmodified pistols.

So, this was our detour on the way to Part 6. We still have unanswered questions, but I hope the blog readers better understand how I arrived at the conclusions I did. Next, we’ll conduct the Crosman 2400KT .22 velocity test, which will be less puzzling and a lot more interesting!

Crosman’s 2400KT Carbine: Part 4

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 3
Part 5
Part 6
Part 7
Part 8

Today’s report is the continuation of a guest blog from reader HiveSeeker about his Crosman 2400KT rifles.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Crosman 2400 KT
The 2400KT CO2 Carbine is available exclusively from the Crosman Custom Shop.

This report covers:

• Velocity: .177 caliber
• .177 pellets I tested
• What’s going on with the .177?
• Can you help?

Velocity:  .177 caliber
Finally — let’s settle down to a serious velocity discussion! I tested a wide range of different-weight pellets to get a good cross-section of the Crosman 2400KT’s performance. The 2400KT .177 generated an average of 569 f.p.s. with the .177 boxed Crosman Premier Lights, B.B.’s favorite all-around, typical .177 pellet. [Note: I obtained these pellets after completing the shots-per-fill testing with the Crosman Premier Hollowpoint hunting pellets, which was the closest match I had at that time.]

Pistol velocities ranged from a high of 655 fps with the 4.0-grain alloy Crosman SSP, down to 509 fps with the 10.5-grain Crosman Premier Ultra Magnum heavy. I chronoed a lot of pellets; so instead of discussing the velocities in text, let’s look at the complete velocity table:

Crosman 2400 KT velocity

.177 pellets I tested
Below are some comments on the individual pellets. I won’t repeat all the specific velocity data since that’s already available in the table above.

Crosman 2400 KT 177 pellets
A wide range of pellets were tested to obtain a good cross-section of data for the .177 Sassy Sandy 2400KT.

Crosman SSP: This lightest alloy pellet gave the highest velocity (655 fps), as would be expected. It was loud — but not as loud as the same pellet in .22.

Gamo PBA Blue Flame: The Gamo PBA Blue Flame alloy pellet was by far the tightest of any I tested in either caliber! I’m sure part of the reason is that when chambered, the hard alloy is not engraved by the rifling as easily as lead. I shot 10 pellets, got my velocity average, and will probably not be feeding these to my 2400KT ever again. Blue Flame pellets also gave the widest spread of any other .177 pellet, at 28 fps — high for a CO2 gun, and a possible predictor of poor accuracy.

RWS Hobby: Another preferred pellet of B.B.’s, the RWS Hobby was a little tight and was also louder than any other .177 pellet in the 2400KT.

Gamo Magnum: The Gamo Magnum pointed pellet averaged slightly faster than the lighter RWS Hobby.

Crosman Premier Light: The fit of this favorite of B.B.’s was a little tight. My first experience with these cardboard-box pellets is that they do not travel well in large numbers. There were a lot of damaged skirts, and I had to choose carefully to make sure I was getting valid velocity and accuracy data.

Crosman Premier Hollow Point: The Premier Hollow Point fit tighter than the Crosman Premier Light. It had the narrowest spread of any .177 pellet, at only 10 f.p.s.; and, hopefully, we’ll see this translate to repeatable ballistic performance and good accuracy.

RWS Superdome: Despite weighing slightly more, the RWS Superdome had the same velocity as the Crosman Premier Hollow Point. We’ll see similar above-par performance from its .22 big brother. This pellet fit a little tightly and had the second-widest spread of the .177 pellets — at 24 fps.

Crosman Premier Ultra Magnum: Crosman Premier Ultra Magnum .177 heavyweights gave the slowest velocity, as expected, with an average just above the line at 509 fps. The fit was tight.

The Crosman 2400KT generates .177 velocities in a very stable range reminiscent of its near relatives, the Crosman 2300T and the 2300S target pistols. My only other general comment on the .177 velocities is that I expected the velocity spreads to be generally smaller based on the very smooth velocity line we saw in the shots-per-fill graph in Part 3. Consistent CO2 regulation and pellet velocity are prerequisites for dependable accuracy, so it’ll be interesting to see if the pellets with the smallest velocity spreads also tend to be the most accurate.

What’s going on with the .177?
You’ve already seen from the shots-per-fill graphs and a couple preliminary velocity numbers that the HiveSeeker .22 is getting the same velocity as the Sassy Sandy .177. I know of no other pellet gun that has the same velocity with .177 pellets as .22 pellets!

Crosman 2400 KT 177 and 22 same velocity
The Crosman 2400KT gets almost exactly the same velocity in .177 as it does in .22! How can this be?

Compare the spring-piston Browning 800 Express. B.B. got 651 fps from this pistol using an average-weight .177 lead pellet, the 7.56-grain Gamo Match. His good friend Earl “Mac” McDonald tested the .22 version of the Express and got 441 fps with typical 14.3-grain Crosman Premiers. That is exactly what I expect from .177 and .22 pellets shot from the same powerplant — a very wide velocity spread (in this case, more than 200 fps) in favor of the much lighter .177.

This makes something seem wrong with the .177 2400KT — at first. But I don’t think I’m giving Crosman too much credit when I say that’s exactly what they intended. I repeatedly contacted Crosman with questions about this velocity disparity. Though their customer service was excellent in every other regard, they’re universally mum on Custom Shop gun velocities. So, hang on while we detour slightly, and then we’ll get back on track with a possible answer.

When B.B. tested the adjustable-velocity 2300S pistol, he got the best accuracy when he dialed the power setting all the way up to full power. Crosman specs state that this will provide a velocity of 520 fps. That is exactly the same velocity B.B. got from the 2300T target pistol with 7.9-grain Crosman Premier Lights.

The 2400KT carbine shoots somewhat higher than that, at 569 fps with the same Premier Lights — and the high 500s just so happens to be where a lot of Olympic rifles shoot. Where am I going with all this? I think that when the Crosman Custom Shop builds a .177 pistol, it builds a .177 target pistol. A pistol with deliberately stepped-down — and more ballistically stable and accurate — velocity that approaches that of their high-end target and silhouette pistols.

And that’s what I think might be going on with the .177-caliber 2400KT. I don’t know if selecting the 10.1-inch Lothar Walther match barrel was a factor in the assembly line velocity reduction, but the bottom line is still the same. If you’re punching paper, go with the .177 — and I do recommend the Lothar Walther barrel if you can swing it. If you’re after fur and feathers, the .22 is the obvious choice — but it certainly won’t disappoint on paper either, as we will see.

Can you help?
As we wrap up Part 4, I remain curious about the lower .177 velocities in the 2400KT. Information from a range of online sources was inconsistent. Stock velocity data was rare compared to modded velocity figures — a lot of shooters seem to be interested in how fast they can go without worrying about where they started. A longer barrel clearly produces more velocity — and that’s an admitted advantage of the HiveSeeker .22 that we’ll address later — but few of the stock .177 velocities I tracked down suggest that this caliber takes full advantage of the 2400KT’s potential.

If you have a stock (yes, stock!) 2400 in .177, I’m inviting you to post your maximum velocities for comparison and discussion. Please be sure to mention barrel length and pellet weight. If I prompt you to actually run outside and chrono your gun, then I’ll also request that you please use a 7.9-grain or similar-weight pellet if possible, for a more consistent comparison. Please do the same with your stock .22 2400s and 14.3-grain pellets for comparison, as well. Thanks in advance, and see you in Part 5!

Crosman’s 2400KT carbine: Part 3

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 2
Part 4
Part 5
Part 6
Part 7
Part 8

Today’s report is the continuation of a guest blog from reader HiveSeeker about his Crosman 2400KT.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Crosman 2400 KT
The 2400KT CO2 carbine is available exclusively from the Crosman Custom Shop.

This report covers:

• Shots per fill: .177 caliber
• Shots per fill: .22 caliber
• Mystified!
• A slow start

As we begin Part 3, I’m reminding my fellow blog readers that we’re looking at the Crosman 2400KT CO2 carbine from the Crosman Custom Shop in .177 and .22, and both are in their natural state — straight out of the box with no modifications.

Shots per fill: .177 caliber
We’ll start by looking at the number of shots per fill. Initially, I didn’t have any of B.B.’s favorite .177 boxed Crosman Premier Lights, so for testing Sassy Sandy’s .177, I chose the ballistically similar Crosman Premier Hollowpoint, which weighs exactly the same — 7.9 grains — and is also rather domed.

Crosman2400KT Sassy Sandy
The Sassy Sandy is a target carbine in .177 with 10.10-inch Lothar Walther choked match barrel, black custom shoulder stock, black trigger shoe and black muzzlebrake. The scope shown here is a CV Life 3-9×40. The cost of this setup was $142.68, not including scope and rings.

Performance should be almost identical (as we’ll later see with the Crosman pellets in .22). With this pellet, I got 40 good shots with the majority over 500 fps. Here’s my velocity table:

Crosman 2400 KT .177 shots per fill

Note that the average velocity varied by only 3 fps across the first 20 shots, and by only 9 fps across the first 30 shots. Smooth! Now, let’s take a look at the velocity graph:

Crosman 2400 KT .177 shots per fill graph
Here’s a nice, level velocity line. The .177 2400KT is one smooth operator in CO2 regulation and pellet velocity. Velocity begins to drop at about shot 28 (marked by the arrow), drops below 500 fps at shot 35, and declines below 400 fps after shot 40.

You can actually see what the velocity table has already told us — velocity control with this pistol is very even. This is something you really want in a target pistol. Velocity began to drop significantly at shot 28, sinking below 500 fps around shot 35. However, a great deal of subsequent shooting during accuracy testing showed that I could consistently expect 40 accurate shots before having to change to a fresh CO2 cartridge. Beyond 40 shots, velocity began to fall toward the 400 fps mark, and accuracy declined almost immediately. I stopped this test at shot 48, when velocity dipped below 300 fps, because I didn’t want to risk a pellet jammed in the barrel.

Forty shots per carttridge is right on the money for what Crosman advertises for the 2400KT’s .177 sibling, the Crosman 2300T. However, B.B. actually got 60 shots per cartridge out of that pistol when he tested it. His velocity with the 2300T averaged 520 fps for 7.9-grain Crosman Premier Lights. My testing with the same pellet in Sassy Sandy’s gun yielded an average 569 fps, so that extra 50 fps in velocity is where those extra 20 shots are probably going.

When B.B. reported on the 2400KT’s other .177 sibling, the high-end Crosman 2300S, he got an amazing 80 shots per CO2 cartridge. This was, again, higher than Crosman’s published specs on the gun — in this case 60 shots per cartridge. This pistol includes an adjustable power knob that controls the velocity. At the highest power setting, B.B. averaged 484 fps with 7.9-grain Crosman Copperhead pointed pellets [Editor’s note: I cannot find this pellet anywhere, so I linked you to the 7.9-grain Crosman pointed pellets], 85 fps less than my 569 fps in the 2400KT with the identical-weight Crosman Premier Light. B.B. got his 80 shots while testing the pistol on both low and high power settings, but he believed that performance would be similar to the 2300T — 60 shots per fill — if the velocity adjustment were left on high power all the time.

In summary, expect 40 good shots per fill from the Crosman 2400KT in .177. This is lower than the 60 shots per fill B.B. says you can expect from the 2300T and 2300S, but it comes with a gain of 50 to 85 fps in velocity.

Shots per fill: .22 caliber
For testing shots per fill for my HiveSeeker .22, I selected the 14.3-grain Domed Magnum from the Benjamin Ultimate Hunting Pellet Assortment. B.B. informs me that this pellet is identical to his favored boxed .22-caliber Crosman Premiers.

Crosman2400KT HiveSeeker
The HiveSeeker is a light-duty small game hunter .22 with 18-inch barrel, simulated carbon fiber custom shoulder stock, black trigger shoe, and black muzzle brake. The scope is a Leapers UTG 4-16×40. The cost of this setup was $123.57, not including scope and rings.

The Crosman Premier Ultra Magnum in the 500-pellet tin is also physically identical. However, the Benjamin Domed Magnum [from the box] specifically advertises single die production — like B.B.’s Crosman Premiers — so this was the pellet I chose as most comparable for the extensive shots-per-fill test. With the Domed Magnum, I got 30 good shots over 500 fps. Here’s my velocity table:

Crosman 2400 KT 22 shots per fill table

Velocity is more variable than we saw in .177, with average velocity varying by 5 fps across the first 20 shots, and 23 fps across the first 30 shots. However, in this case averages can be deceptive, because highs and lows can cancel each other out. When we take a look at the velocity graph, we see the whole story:

Crosman 2400 KT 22 shots per fill graph
This jagged velocity line tells us that CO2 regulation and pellet velocity are less consistent for the 2400KT in .22. Velocity begins to drop at about shot 25 (marked by the arrow), drops below 500 fps after shot 30, and declines below 400 fps as we approach shot 40.

Velocity for the 2400KT is much more variable in .22. A lot of ups and downs give an average that lands in the middle, but which doesn’t really represent all those peaks and valleys. Velocity began declining sharply at shot 25, sank below 500 fps at shot 30 — which proved to be the practical accuracy limit for this gun. They fell below 400 fps just before shot 40. Previous testing had already told me that accuracy dropped sharply after shot 30, so I pushed this test to shot 40 and simply stopped — there was no practical reason to take things any further.

When B.B. tested the 2400KT’s cousin, the .22-caliber Crosman 2240, he estimated most shooters would get 45 to 60 usable shots. He recorded an average velocity of 448 fps for the 2240 using his boxed 14.3-grain Crosman Premiers. The 2400KT trumps that at an average 573 fps — 125 fps faster! — with the equivalent Benjamin Domed Magnum, but at the cost of about half the usable shots.

When B.B. reported on the Crosman 2250XE, which is also a .22 CO2 carbine with an 18” barrel, he found exactly what I did with the 2400KT — up to 30 usable shots per CO2 cartridge. He got 546 fps with his boxed 14.3-grain Crosman Premiers, which approaches the 573 fps I got with the equivalent Benjamin Domed Magnum in the 2400KT. The 2250 (affectionately nicknamed the Ratcatcher by shooters) is no longer offered by the Crosman Custom Shop, but I think my HiveSeeker and the 2250XE are almost the same gun — except for that unique skeleton wood stock!

In summary, expect 30 accurate shots per fill from the Crosman 2400KT in .22. This is half the shots — at a 125 fps velocity gain — compared to the Crosman 2240, but very similar in both shot count and performance to the Crosman Outdoorsman 2250XE.

Those of you who got your coffee this morning have already noticed several very interesting things about these shots-per-fill graphs and the few velocities we’ve mentioned so far. First of all, both the .177 and .22 versions of the 2400KT have the same velocities. That can’t be right! Second, while 570 fps with a typical lead pellet isn’t too interesting for a .177, it is for a .22 non-PCP pistol! And those of you who had two cups of coffee this morning have noticed a smaller detail — for both calibers, velocity starts a little low before leveling off at a higher velocity as the shot count increases. Let’s knock out this last detail first.

A slow start
As I began my velocity testing of the 2400KT, I noticed that many pellets started with a very low initial velocity that increased significantly over the next few shots and then leveled out. This was truer of my wife’s .177 Sassy Sandy than it was for my .22 HiveSeeker. A few low velocities at the beginning of a 10-shot string can reduce a pellet’s velocity average, which will not be a good representation of that pellet’s overall performance. Take another look at those .177 and .22 velocity tables — this is why shots 1-10 average slower than shots 11-20 for both calibers.

Looking at my velocity graphs, I decided that to try to account for this, but still be accurate, I would start counting velocities at the point where two consecutive shots fell within 10 f.p.s. of each other. For many of the pellets I tested, this resulted in my discarding the first 2 or 3 shots, and taking my actual velocity average from around shots 4 through 13. This gives a much more representative picture of how each pellet is really performing once the pistol gets warmed up. I also noticed that velocity would sometimes continue to increase slightly throughout that 10-shot string, so the average velocities I present here may actually be slightly under-reported.

Crosman 2400 KT 177 slow start
Velocity starts low but increases rapidly, leveling off at shot 4. In this example, only the shots in the blue shaded area (shots 4 to 13) were used to calculate the pellet’s average velocity. You can see that those shots are much more representative of the pellet’s overall performance across the entire 10-shot string than the shots in the white area of the graph. This data is from the 7.9-grain .177 Crosman Premier Hollow Point Hunting Pellet.

Crosman 2400 KT 22 slow start
Again, velocity begins low but rises rapidly. It levels out at shot 4, and only shots 4 to 13 (in the blue shaded area of the graph) are used to calculate the 10-string average velocity. You can also see in this example that velocity continues to rise slightly across the entire string, so my average velocities might be slightly under-reported. Data is from the 14.3-grain Benjamin Discovery Hollow Point from the 500-pellet tin.

From these graphs, I’m confident that the velocities I’ll be reporting in Part 4 will be much more representative of how the Crosman 2400KT really performs. We’ll also try to solve our little mystery and then decide exactly how interesting those .22 velocities really are!

Crosman’s 2400KT carbine: Part 2

by Tom Gaylord
Writing as B.B. Pelletier

Part 1
Part 3
Part 4
Part 5
Part 6
Part 7
Part 8

Today’s report is the continuation of a guest blog from reader HiveSeeker about his Crosman 2400KT. I actually took what was his Part 1 and broke it into 2 sections, so this is the second half of the original Part 1.

If you’d like to write a guest post for this blog, please email me.

Over to you, HiveSeeker.

Crosman 2400 KT
The 2400KT CO2 carbine is available exclusively from the Crosman Custom Shop.

This report covers:

• No tipping, please
• Trigger tips
• First shot

Let’s pick up where I left off. I’ve just introduced you to the Sassy Sandy and HiveSeeker carbines — two 2240KT carbines I set up for my wife and me. My wife’s carbine has the CV Life 3-9X40 scope, which is light enough for her.

The scope I mounted was a Leapers 4-16X40. Although a similar scope is available with 11mm dovetail airgun rings, that version was out of stock everywhere at the time of my purchase. I ended up ordering the version with Picatinny rings (otherwise identical as far as I can tell), and buying UTG Accushot high profile airgun rings separately. This is a large scope! It has to straddle the breech opening, and high profile rings give a little more finger room for pellet loading in addition to accommodating the large objective. Having to straddle the breech, there’s also less horizontal wiggle room for positioning the scope for best individual eye relief.

To hedge my bets, I also ordered a set of narrower, 2-screw UTG Accushot scope rings in case my scope needed a little more horizontal leeway. I didn’t end up needing them, but other shooters have. Keep this option in mind if you purchase this gun and choose to scope it. [Editor’s note: The 2-screw Accushot rings are no longer available.]

Crosman 2400 KT scope rings
Narrow 2-screw scope rings allow more horizontal leeway if needed to correctly position the scope for best individual eye relief. Though not as secure as 4-screw rings, they’re quite adequate for the low-recoil CO2-powered 2400KT.

The first time my wife saw this very full-sized scope on my 2400KT, she exclaimed “Your scope is bigger than your gun!” At 22.3 oz., this scope almost does outweigh the pistol and stock! However, this setup was very similar to what my acquaintance had who originally recommended the 2400KT to me, and it worked very well for him. At the time, I didn’t realize that I was entering already-charted waters, but if you want to see a similar setup, check out B.B.’s evaluation of the Crosman Outdoorsman 2250XE.

While my combination looks unwieldy, it shoots like a dream — though I would definitely recommend that you avoid going any heavier on the scope. Women and youth shooters and those seeking a lightweight carbine will want to track down different optics, like the Hawke scope mentioned in part 1.

Crosman 2400 KT Leapers 4-16X40
“Your scope is bigger than your gun!” my wife exclaimed the first time she saw this Leapers UTG 4-16×40 mounted on my 2400KT. It looks cumbersome and you would definitely not want to go heavier, but this combo shoots like a dream.

No tipping, please
I’ve already mentioned that high-profile scope rings provide a little more finger room for pellet loading in the 2400KT. This is very helpful, because pellets absolutely love to tip nose-down or flip backwards in this breech! This is a quirk of the entire 2XXX family of Crosman CO2 pistols, and it occurs with both plastic and steel breeches.

While researching this blog, I came across a multitude of specialized techniques for loading these guns. Ultimately, my wife and I found that a pellet pen is a great help, though not a complete solution. Certain pellets are still quite prone to sit skirt-up, or flip backwards (skirt-first) as you try to load them.

I found that by resting a properly-oriented pellet on the flat surface to the right of the breech channel, and then rolling it gently into the channel with my fingertip, I could usually get it to stay correctly oriented until loaded. For pellets that like to flip backwards as you load them, I found that tipping the muzzle of the gun up would often cause them to flip back into nose-first position ready for loading. This wouldn’t be too difficult while shooting offhand, but repeatedly having to tip the barrel up was a major inconvenience during all the benchrest shooting I did.

Short, “fat” nose-heavy pellets were the worst offenders, especially domed pellets like the .22-caliber Crosman Premiers, with that nice round nose to roll on. Longer-skirted pellets were much better behaved, especially flat-nosed wadcutters. This problem was much worse with the .177 pellets than it was with the .22 pellets. My wife and I both got better at pellet loading with time, but I was still tipping the occasional renegade pellet back into position up until my very last test shot.

Crosman 2400 KT tipping Premier 1
This is the way the pellet is supposed to be loaded into the gun.

Crosman 2400 KT tipping Premier 2
Short, nose-heavy pellets like the otherwise good Crosman Premier have a remarkable tendency to flip skirt-up or backwards in the 2400KT’s steel breech.

Some pellets fit very tightly in the barrel during chambering. Domed pellets, even if tight, would usually slide straight in. But sharp-edged pellets such as wadcutters or hollowpoint noses with similar sharp edges would sometimes catch on the edge of the barrel as they were inserted. For easier pellets, backing the bolt up slightly and then pushing it forward again would smoothly seat the pellet. For pellets that tended to  catch an edge, I found that touching the top edge of the pellet skirt as the probe seated it into the barrel could help center the nose and provide a smoother insertion.

Trigger tips
The single-stage trigger on the 2400KT has very little travel, which I really like. It does not feel crisp out of the box. I think this is partly due to its heavy pull, but the release is positive and clean. The trigger-pull averaged just under 5.50 lbs. (or 5 lbs., 8 oz.) on the .177, and just over 5.50 lbs. on the .22. Although the difference was small, the heavier pull on the .22 was noticeable.

Crosman 2400 KT trigger
The 2400KT trigger is not crisp out of the box, but the release is clean and creep-free. The trigger-pull was on the heavy side at just under 5.50 lbs. (or 5 lbs., 8 oz.) on the .177, and just over 5.50 lbs. on the .22. If you order, be sure to include a trigger shoe. An adjustable overtravel screw helps the trigger feel crisper.

But guess what? This trigger is adjustable! The Custom Shop website won’t tell you. The included manual, which is actually for the Crosman 2240, doesn’t mention it. And you can’t tell by just examining the gun. But remove the shoulder stock, and there it is!

You adjust the trigger by turning the knurled dial to move the spring retainer up (increasing trigger-pull weight) or down (decreasing trigger-pull weight). I initially began adjusting this trigger in very small increments, but eventually turned it down all the way to the minimum spring tension setting. This resulted in a pull of 2.40 lbs. (2 lbs., 6 oz.) on the .177, which I actually found a little bit too light. On the .22, the low trigger-pull setting yielded almost exactly 3 lbs. This still seemed slightly heavy to me, and I wished that I could have dialed it a hair lower. However, this was still an improvement on an already-good trigger.

When B.B. checked trigger pulls on Crosman’s two CO2 match pistols, he got a range of 2 lbs., 14 oz. to 6 lbs., 12 oz. on the 2300T, and 2 lbs., 6 oz. to 5 lbs., 8 oz. on the 2300S (see Crosman’s 2300T, and Crosman 2300S target pistol). The 2400KT appears to have the same adjustable trigger. Sweet! The Crosman 2300T and 2300S manuals list adjustable trigger-pulls from 1 to 4 lbs.; but as you can see, the actual field measurements are heavier. Those manuals also include trigger adjustment instructions, and the 2300T manual might have been a better manual to include with the 2400KT than the 2240 manuals that came with my two guns. However, the trigger adjustment is simple and intuitive.

Crosman 2400 KT manual
The Crosman 2400KT CO2 carbine comes with a 2240 manual that has a “2400 Custom Shop Airgun” sticker over it. Check the Spanish or French section of the manual, and the truth is revealed!

Crosman 2400 KT adjustable trigger
Neither the Custom Shop website nor the included manual hint at an adjustable trigger. You have to remove the shoulder stock to access it. Here it is!

Crosman 2400 KT adjustable trigger 2
Adjust the spring tension by turning the knurled dial to move the spring retainer up (increasing trigger-pull weight) or down (decreasing trigger-pull weight). On the left, the adjustment dial is at the factory setting. On the right, the dial is shown screwed downward to the lowest tension setting (and lightest trigger-pull).

The trigger includes an overtravel screw, which you can adjust to stop the trigger blade immediately after the hammer is released. This is a great addition to a target pistol. Like the trigger shoe, the overtravel screw does nothing to actually improve the trigger itself, but it does help the trigger feel crisper and cleaner by eliminating excess travel. I adjusted the overtravel screw in about one-and-a-half turns. This, combined with the lighter trigger-pull, makes for one nice feeling trigger! It’s still not quite as crisp as I would like, which is why I still recommend the trigger shoe. Overall, though, this trigger is a pleasure to shoot.

First shot
While researching for this blog, I repeatedly came across references to this family of pistols stating that the first shot on a new CO2 cartridge is always a dud. It’s not! I’m a manual reader, and the manual tells you that you need to cock and fire the gun once before actually loading a pellet in order to puncture the CO2 cylinder. During velocity testing, I found that the first “real” shot was usually much slower than subsequent shots, so I’ve gotten into the habit of firing off a second shot of CO2 before actually loading ammo. Finally, remember to put a drop of Crosman Pellgunoil on the tip of each CO2 cylinder when you install it to keep all those seals healthy and happy.

I’ve spent a lot of time telling you about the Crosman 2400KT CO2 carbine, without telling you anything about how it performs. In the next part, we’ll be looking at shots per fill and velocity. Prepare to be pleased, and — perhaps — mystified!