Posts Tagged ‘RWS Superdome pellets’
by Tom Gaylord, a.k.a. B.B. Pelletier
This report covers:
• Inconsistent shots?
• Most accurate pellet?
• 100 yards means scope adjustments
• JSB Exact Jumbo heavy pellets
• Crosman Premier pellets
• H&N Baracuda Green pellets
• Gamo Hunter pellets
• Call it a day
• Pyramyd Air sale
Today is a test of the Hatsan AT44-10 Long QE at 100 yards. I don’t do this very often for many reasons; but when I find a PCP that’s exceptionally accurate at 50 yards, I feel it’s worth testing at the greater distance. It takes a perfect day for this test because any wind will push the pellet around. We don’t get many windless days here in Texas, but this past Wednesday was one of them. It was so calm that dandelion fuzz would fall straight down.
You also know from reading this blog that groups do not always open in linear fashion as the distance increases. A rifle that shoots a half-inch group at 50 yards will not automatically shoot one-inch groups at 100 yards — even though the day is perfect.
While testing this rifle, I’d seen that the first 10 shots could be less accurate than the second 10. They sometimes contained fliers that didn’t seem to exist in the second group. Yesterday, blog reader Jerry in Texas asked me why one shot out of 10 from his Benjamin Marauder was dropping in velocity by over 250 f.p.s. I told him I thought some PCP guns do that in certain places in the power curve. I saw evidence of that on the 50-yard range and again at 100 yards, as I’ll show you.
Most accurate pellet?
I also hedged my bets by taking several pellets to the range that hadn’t been tested in this rifle before. I was getting such great performance at 50 yards from one pellet in particular — the 18.1-grain JSB Exact Jumbo Heavy — that I sort of stopped testing other pellets. That’s not very scientific of me, though it’s very much in keeping with being a gun crank. So, I took some other pellets along and gave them a try at 100 yards — even though they’d not been tried by me before in this rifle.
100 yards means scope adjustments
I knew the pellet would drop a lot going from 50 yards to where the rifle was sighted to 100 yards. I guesstimated the drop would be at least 12 inches, which would be 48 clicks on the quarter-minute elevation knob to bring things back up. But when I adjusted the scope, I stopped at 40 clicks because you never know if the clicks are exactly quarter-minute or if that’s just an approximation. As it turned out, both my guesstimate and the adjustments were close to correct, and I had to adjust the scope another 16 clicks up to get close to the point of aim.
JSB Exact Jumbo Heavy pellets
The first pellet up was the 18.1-grain JSB Exact Jubo Heavy that had given me a group of 10 in 0.522 inches at 50 yards. If any pellet was going to excel in this rifle at 100 yards, I felt this one had the best chance. Alas — the best-laid plans….
The best I was able to do with this pellet was 10 in about 3 inches. I shot the same pellet in both the first 10 shots and the second 10 shots per fill with pretty much similar results, except there was a flier in the first group. I’m not going to show you those groups because they don’t help the report and also because the first group fell below the target paper and hit the 2×4 backer paper I always use when I’m not sure where the pellets are going.
At this point, I decided to punt — as in testing something I hadn’t tried before. One reader had recommended trying the 15.89-grain JSB Exact Jumbo pellets, and I thought it was a good choice. It happens to be one of my favorite .22-caliber pellets, and I normally would have tested it at 50 yards; but when the heavier JSB did so well, I decided to just shoot it to the exclusion of all others.
I refilled the rifle with air and loaded 10 JSB Exact Jumbos into the circular clip. The first group was very telling. Nine out of 10 pellets landed in a 1.668-inch group, but the first shot hit about 4 inches above the top of this main group. Remember what I said about inconsistencies in the first 10 shots after a fill?
After that group, I refilled the clip and shot a second group with the same pellet. This time, all 10 went into 2.385 inches. I know that doesn’t sound very good, but I ask you to reserve your comments until you have shot some 10-shot groups of pellets at 100 yards. It isn’t easy! And guns that group in a half-inch at 50 yards do not necessarily group in one inch at 100 yards.
Look at the shapes of these holes. Many are oval in shape, which indicates they didn’t go through the paper straight-on.
Crosman Premier pellets
One of the most accurate .22-caliber pellets is the domed Crosman Premier that comes in the brown cardboard box. Sometimes, they’re the most accurate, and other times they’re among the top 3. But in PCPs they don’t do as well — especially when the PCP is more powerful such as this Hatsan. And this was no exception to that rule, as Premiers couldn’t stay inside 6 inches at 100 yards. I didn’t even complete a group with them after seeing the first few shots land so far apart.
I’d planned on trying Eun Jin pellets, as well; but when I started loading them, I discovered that the tin I picked up were .25-caliber pellets.
H&N Baracuda Green pellets
The next pellet I tested was the H&N Baracuda Green. While lead-free pellets are not that accurate as a general rule, Baracuda Greens are an exception. In the Hatsan, they managed to put 10 shots into 5.25 inches, with 9 of those shots in 2.988 inches. That’s pretty good for lead-free pellets; and, yes, this was the first group of 10 after a fill.
Gamo Hunter pellets
The last pellet I tried was the Gamo Hunter. While I have very little experience with this pellet, I do recall it working well in one spring rifle years ago. But it was not suited to the Hatsan AT44. I didn’t see where the first Hunter struck the target; but I saw the second pellet’s flight through the scope, and it was a wild spiral curve to the right that landed a foot off the target! Clearly this rifle is not suited to shoot Gamo Hunters.
Call it a day
After this last attempt, I decided to call it a day. The shooting had worn me out by this time. I think it’s clear that of the pellets I’ve tested so far, the JSB Exact 15.89-grain Jumbo is the best. Out to 50 yards it may do no better than the heavier 18.1-grain JSB Jumbo Heavy, but something about this lighter pellet carries it to 100 yards in better form.
I believe the Hatsan AT44-10 Long QE is one of the finest PCP rifles on the market at any price. It has power, accuracy, a great trigger and very quiet operation –all for a wonderful price. If you’re in the market for a good PCP, I would put this one on your short list.
Pyramyd Air sale
Pyramyd Air is having a “Christmas in July” sale. If you’re planning to make a purchase, click here to visit their sale pages.
by Tom Gaylord, a.k.a. B.B. Pelletier
WARNING: This conversion changes the operation of the pistol to use air at up to three times the pressure it was designed for. The parts that are installed are strong, but there are other parts in the gun that aren’t changed and could fail when subjected to the higher pressures. Pyramyd Air advises anyone making such a conversion to exercise extreme caution.
This report covers:
• Where we are
• Before filling the first time
• Shooting the gun
• Crosman Premier pellets
• RWS Hobby pellets
• RWS Superdome pellets
• What comes next
Let’s look at what the conversion to air did for the Crosman 2240. Boy, was there ever a lot of discussion on that report! I think this may be one of the all-time most popular subjects on this blog.
Where we are
Here’s where I am with this subject. The 2240 is now converted. I plan to test it with 2,000 psi air today, and I do not plan to go higher. This is a test of what’s out there and some of the things that can be done with a 2240, but I’m not in the business of hotrodding this pistol. Many other folks are doing that very well; so, if you are interested in what’s possible, read what they have to say.
Today, I’m going to test the pistol with the conversion but with the stock striker spring still installed. In other words, if you simply screwed the tube into the gun and did nothing else (the front sight still has to come off to clear the tube), this is what you’ll get. I did change the face seal, which is why I disassembled the pistol in the previous report; but that wasn’t strictly necessary, since I am pressurizing to only 2,000 psi. I did it just to show how the entire kit is installed.
Before filling the first time
Before filling the gun, which is now done through the male Foster nipple on the end of the air tube, I put several drops of silicone chamber oil into the fill nipple. It came to me bone-dry, and I wanted all the seals inside the unit to get a coating of this oil. Then, I connected the gun to my carbon fiber air tank and slowly filled it to 2,000 psi. I say slowly, but as small as this air tube/reservoir is, it fills pretty fast. It probably took only 15-20 seconds to fill it all the way. You want to go as slowly as as possible to keep heat from building.
When I bled the air connection in the hose, the inlet valve in the air tube remained open and all the air bled out. So, I refilled it and bled it a second time. This time, it sealed as it should — thanks to the oil, I believe.
Shooting the gun
It was now time to test the gun. I had no idea what it was going to do, but I left my hearing protection off to hear if the first shot was loud. It wasn’t. Perhaps the gun is a little louder than it is when using CO2, but the difference is not that great. Of course, I used eye protection for the chronographing session, because the pellet trap is so close. I use a trap with duct seal to keep the rebounds down and the noise to a minimum.
Crosman Premier pellets
The first pellet I tested was the 14.3-grain Crosman Premier dome. I should add that I shoot only the pellets from the cardboard box, which is why I link to them, only. We were informed several months ago that Crosman planned to stop selling Premiers in the cardboard box and I stocked up on them. But I see they’re still available.
Back in 2010, I did a test of the CO2 2240 pistol, so I have the recorded velocities for this exact pistol on CO2. It averaged 448 f.p.s. with Crosman Premiers. On 2000 psi air, the first shot was 468 f.p.s. It increased to a maximum of 492 f.p.s. by shot 7 and dropped back to 466 f.p.s. by shot 15. At the end of the string, the gun was still holding 1200 psi of air pressure. The average velocity of 15 shots was 486 f.p.s., which means air boosted the average velocity of this pellet by 39 f.p.s.
RWS Hobby pellets
Next up were 11.9-grain RWS Hobby pellets. When the pistol was running on CO2, these pellets averaged 482 f.p.s. On 2000 psi air, they started at 515 f.p.s. and increased to 537 f.p.s. by shot 9. The velocity droped back down to 511 f.p.s. by shot 16. The average velocity for this string of 16 shots was 525 f.p.s. — a 43 f.p.s. increase on air. The remaining pressure was 1200 psi, once again.
RWS Superdome pellets
The final pellet I tested was the 14.5-grain RWS Superdome. When the pistol ran on CO2, Superdomes averaged 455 f.p.s. On 2000 psi air, they started at 470 f.p.s. and drifted up to 495 f.p.s. by shot 7. They dropped back down to 467 f.p.s. by shot 16. The average velocity was 483 f.p.s., an increase of 28 f.p.s. over CO2.
Notice that the gun performs similarly, regardless of what pellet was tested. The curve starts out slow, builds to the maximum quickly and then drops back to the starting point just as quickly. The three pellets gave a total shot count of 15, 16 and 16, respectively.
What comes next?
I can’t test the pistol for accuracy as it is right now because the front sight has no clearance to be re-installed. And the plastic 2240 receiver does not have a scope base on the receiver. Decision time.
I could get a steel breech for the 2240 from Pyramyd Air. While it will not accept the 2240 rear sight, it does have 11mm dovetails for a scope. That’ll work with the barrel that’s on the gun right now; but if I get a longer barrel, I’ll get a little more velocity from this same setup. So, I ordered a 14.5-inch barrel from an eBay vendor.
There are a number of different ways this can go with these parts, so I will wait to see what seems best once I have them.
by Tom Gaylord, a.k.a. B.B. Pelletier
This report covers:
• Fast becoming a favorite
• Accuracy test
• Stunning first group!
• Tried RWS Superdomes
• Finish with JSB pellets
• Overall evaluation
• 100-yard test
Fast becoming a favorite
Today, we’re back at the 50-yard outdoor range with the Hatsan AT44S-10 Long QE rifle — an air rifle that’s fast becoming a favorite of mine. I think you’ll see why in this report.
Last time, I showed you some excellent 10-shot groups from this rifle at 50 yards. That day was perfectly calm, and by chance the second pellet I tried turned out to be the one to shoot. The 16-grain Air Arms Diabolo Field pellet delivered some great groups, including one 10-shot screamer that was just 0.624 inches between centers. I resolved to return to the range another day to see if this was just a one-time thing or if the rifle could deliver such stunning accuracy all the time.
This day was not perfect. There was a little breeze sometimes, but in the beginning it could be waited out. It was only 1-3 m.p.h. when I began shooting. Last time, I learned that the first 10 shots on a fresh fill weren’t as accurate as the second 10, so I filled the rifle to 200 bar and loaded ten 18.13-grain JSB Exact Jumbo Heavy pellets, thinking that I would save the sure-thing Air Arms pellets for the second 10.
Stunning first group!
But my first group was stunning! Nine of the 10 pellets went into 0.552 inches and only shot 8 strayed from the main group. It enlarged the group to 0.916 inches, which is still commendable for 10 shots.
Now that the first 10 were shot, I thought the rifle was going to give me a wonderful second group with the Air Arms pellets — but for some reason, it didn’t. Ten went into 1.434 inches, with 5 of them clustered in 0.212 inches. How do I make sense out of that?
The Hatsan is short of breath, and there are only 20 good shots per fill if you’re shooting groups at 50 yards. I filled the rifle, again, and once more I shot the first group of 10 with the JSB Exact Jumbo Heavys. This time, they were a little more open than the first time, but they still managed to all be within 0.676 inches. That’s actually smaller than the first group was, and it’s close to the size of the best group from the previous session (0.624 inches).
The second group I shot was 10 Air Arms pellets, and this time they really opened up. Ten went into 1.334 inches, with 8 of them in 0.824 inches. Apparently, Air Arms pellets were not going to do as well on this day as they had during the previous session!
Tried RWS Superdomes
I brought some RWS Superdomes along — just to try one more pellet. But the first shot was 14 inches from the aim point (!!!) and the next shot was 6 inches from that! I ejected the clip and removed all the pellets. That’s just wasting air.
Finish with JSB pellets
I filled the rifle once more and this time decided to just shoot the JSB pellets since they seemed to want to do better. The first group of 10 went into a whopping 1.71 inches, which was surprising. The second group of 10 was 1.351 inches apart, and I was now having to fight a growing breeze. I can’t say how much the wind affected the last 2 groups, but it probably had some impact.
Based on the results of these two days at the range, I have to say the Hatsan AT44-10 Long QE is one of the most accurate precharged pellet rifles I’ve ever shot. It may not be the most accurate, but it has to be in the top 5!
It’s amazing that an air rifle this powerful is also quiet. It sounds about as loud as my vintage Diana model 27 spring rifle, yet I know it’s producing 35-47 foot-pounds of muzzle energy. And the trigger, while not the absolute finest I’ve ever tested, it still right up there in the top 10.
Hatsan has hit the ball out of the park with this rifle! They’re pricing it to compete with the Benjamin Marauder, and it absolutely kills the more expensive European PCPs in all categories except appearance. But I’m the kind of shooter who wants to hit the target. I don’t care that much what my rifle looks like — as long as it can deliver the mail.
The last time I had a PCP that was this accurate was when I tested the AirForce Airguns Condor SS, and that rifle put 10 pellets into one inch (1.003 inches) at 100 yards. This Hatsan isn’t quite as powerful as the Condor SS, but I’m willing to give it a try at that distance. So, there will be a Part 5 to this series!
by Tom Gaylord, a.k.a. B.B. Pelletier
This report covers:
• Lots of interest
• Mounted the scope
• The scope
• Initial accuracy
• Examine the baffles
• Back to Premiers
• Conventional artillery hold not right
• Found the secret
• Cocking effort
• Firing behavior
Today is like one of those pregnant pauses in a movie. You know what you want the hero (that’s either me or the Benjamin Trail Nitro Piston 2) to say, but he just won’t say it. The poorer the actor, the longer you wait. Not today.
The Benjamin Trail Nitro Piston 2 works!
Oh, there’s a lot to tell, and I’m far from finished with my evaluation, but that’s how the story will end. I want to tell you about the rough and rocky road it took to get to that point — and we aren’t quite there yet.
Mounted the scope
I’m going to start shooting for accuracy, so first I mounted the 3-9X32 CenterPoint scope on the rifle. Mounting was easy, and the scope aligned very well. Then, it was time to sight in the rifle. I always start at 12 feet from the target, so I know I’m on paper. I would start at 10 feet, but I have a door jamb at 12 feet, so there you go. The object is to get the pellet to hit in line with the center of the target and as far below the aim point as the center of the bore is below the center of the scope.
It took 3 shots to adjust the scope to the point that I knew the rifle would be close at 10 meters. Next, I set up a bench at 10 meters and proceeded to shoot several more shots — refining the zero. At 10 meters, I want to hit one inch below the aim point so the pellet will be on target at 20 yards. I’m going to shoot from 25 yards today; but as fast as this rifle shoots, it will be on the aim point between 20 and 30 yards, approximately, if I sight-in this way.
A couple more shots, and I was sighted-in. I went back to 25 yards and started shooting seriously.
Before we move on, I’ll comment on the scope. While it does have clear optics, the parallax isn’t adjusted for 25 yards; so, on 9x the bull was out of focus. One reader asked me for my observation and there it is. I think a scope for a rifle like this should have its parallax adjusted for 20-25 yards if the scope is going to have fixed parallax.
I began shooting with .22-caliber Crosman Premiers, as those are the pellets I felt might do the best in this rifle. The first couple shots went to my exact aim point, then they started dropping several inches below. I ended up with a nice group of 6 shots about 2 inches below the aim point and 4 more shots that ranged up to the aim point. All in all, not a very good group. I switched pellets.
I tried JSB Exact Jumbos next; but when the first 3 shots went into 1.50 inches, I stopped shooting. Next were Beeman Kodiak pellets. By shot 3, the group was already larger than an inch and a half, so I stopped. Finally, I tried some RWS Superdomes, and this time I stuck it out for 6 shots. They landed in 2-1/4 inches, and that stopped the whole show. Something was wrong!
Examine the baffles
Whenever I get wild or open groups like these from a gun that has baffles, I suspect the pellets are hitting the baffles or the end cap as they leave the gun. So, I shined a strong light down the muzzle and looked around all the baffles — looking for places where a pellet might have ripped off some of the plastic or left a gray streak. On aluminum baffles, a gray streak is what to look for, but these baffles are plastic, so I thought they might have been cut slightly.
But they looked perfect. They were completely round and there were no marks of any kind. I could see all the way down to the true muzzle of the gun, so I looked at the crown, to see if it was rough or out of round. And that’s when I saw it. Or, rather, I didn’t see it. I was unable to see the whole muzzle! Part of it was obscured by the last baffle! It was not in line with the bore!
The baffles are one cast piece of synthetic, and they’re separate from the shroud tube. I showed them to you in Part 1. They have rubber o-rings on each end of the baffle tube to center the baffles inside the shroud tube. But here’s the rub. The baffles, and not the shroud tube itself, thread onto the end of the barrel. The baffle tube has an end cap that holds tension against the shroud tube. Once the baffles are tight, everything is tight; but it’s still possible for the shroud tube to rotate. If that happens, it’s possible for the baffles to be misaligned with the muzzle of the barrel — or at least it is on my test rifle! All I had to do was rotate the shroud tube about 90 degrees, and then I could see the entire muzzle! It was time to shoot another group.
Back to Premiers
I went back to Crosman Premiers now that the muzzle was clear. The inside of the baffle tube looks like it has more than enough room for even a .25-caliber pellet to pass through without touching, so I figured it would be okay. This time, I shot a much better group of 10, with 8 pellets in 0.915 inches. The last 2 pellets opened the group to 1.748 inches, and they just looked wrong as I watched them fly to a different spot through the scope. Something was wrong, but I didn’t think it was the pellets.
Conventional artillery hold not right
I switched to H&N Field Target Trophy pellets. This time, they all landed in a nice 1.1357-inch group until the final 2 shots opened it to 1.704 inches. Clearly, something still wasn’t right, but I didn’t know what it was. However, I was starting to suspect that the conventional artillery hold isn’t right for the NP2.
I tried both Kodiaks and Superdomes, again — this time with the rifle rested directly on the sandbag. The results were about what you would expect when resting any breakbarrel springer directly on a bag — 3 shots scattering wide in 2-1/2- to 3-inch groups. Obviously, that’s the wrong thing to do!
I found the secret
I shot another 10-shot group of Premiers and experimented with the hold as I shot. When I firmly held the pistol grip, the group tightened up. When I relaxed in a traditional artillery hold, the shots went wild. The group looks bad at 2.508 inches overall, but 7 of those shots are in 1.042 inches and 5 are in 0.802 inches.
Next, I shot another 10-shot group of Premiers, With the pistol grip held tight, 10 shots went into 1.207 inches, with 9 going into 0.835 inches. Eight shots went into 0.514 inches. It’s not a smaller group overall, but there are more shots in the main group. I’m learning how to hold the rifle.
That was followed by another 10-shot group of Premiers. This time, 10 went into 1.178 inches, and 8 were in 0.721 inches. I was definitely learning how the NP2 wants to be held.
I said in Part 1 that the effort to cock the rifle was heavier than I remembered from the SHOT Show, and in Part 2 I gave the effort as 38 lbs. as measured on my bathroom scale. I also said in Part 2 that the rifle seemed to get easier as I tested the velocity, but testing it on the scale once more didn’t bear that out. Well, after today’s shooting, which added more than 70 shots to what was already on the gun, the cocking effort has dropped to 32 lbs. The rifle is getting into the area where it’s worth taking notice! Do you remember that I said it probably needs to be broken in? I may have proven that in this test, but I need to test the velocity, again, just to show that lighter cocking doesn’t also mean a loss of velocity.
After over 70 shots, I found myself tiring from the session, so I stopped; but the rifle didn’t seem that hard to cock. This is a surprising and happy revelation.
As I was shooting targets today, I found the trigger very heavy. I’ll try to adjust it lighter next time. It’s still smooth and crisp.
The gun still shoots dead calm without vibration, but the two-way recoil is very noticeable. I had to tighten the ring caps after the scope slipped 3/8 inch from recoil in the first 15 shots. That was my fault for not tightening the screws enough to begin with.
These groups are not what I had hoped for, but they do show that there’s a right way to hold the gun. I don’t think I have that hold perfected, yet, but I’m closer than when I began. I actually believe the NP2 is capable of much better groups than those you see today because there are smaller groups that look wonderful in each of the final groups.
Crosman said they were able to get one-hole groups at 35 yards. I’m not there yet, but I’m certainly able to put 5 out of 10 into a single hole at 25 yards. Next time, I’ll shoot only Premiers and will begin the test knowing how to hold the rifle. It should get better from there.
by Tom Gaylord, a.k.a. B.B. Pelletier
Today’s report is a second installment from our blog reader RifledDNA, a.k.a. Stephen Larson. He’s modified his new Benjamin NP Limited Edition and wants to tell us how it’s going.
If you’d like to write a guest post for this blog, please email me.
Over to you, RifledDNA.
Today is part 2 of my new NP Limited Edition, and we’ll look at what’s changed on the .22-caliber rifle since I took it out of the box, what pellets it likes so far and the accuracy I’ve been able to achieve. I wrote an earlier part 2; but the day after it was finished, Crosman alerted me they had a new stock for me. A few days after that, my order of pellets would arrive. It made sense to wait until these things were available for inclusion in this report. Both packages arrived, the stock was installed, the pellets have been tested and I can now tell you everything that has happened in one big mess of journalistic chop suey.
First, let’s see what I’ve changed on the gun. In the first report, I told you how uncomfortable and misconfigured the grip and trigger assembly seemed to me. I’m used to pistol grips, and the Benjamin NPS was designed for one. I knew that a stock with a pistol grip that fit properly must be found.
I approached Crosman and asked for a Benjamin Legacy Jim Shockey stock based on the fact that rifle is similar to my rifle and both have the highly angled forearm screws. While these things are true, the receiver tube of my NP Limited Edition is 1/8th of an inch wider than the tube of the Legacy NP, and the forearm screws are not located in the same place.
The screw holes needed to move an inch back to line up with the screw holes in my rifle; and the stock above the trigger, where the end of the spring tube rests, had to be notched, allowing the stock to open wide enough to receive the larger diameter receiver — say that 5 times fast!
Anyway, the action has now been fitted into the new stock, and it makes me very happy. Although it’s Mickey-Moused in, it’s solid. While someone might notice the screws are now in a different spot, shooting yields no problems. Quite the contrary. It fits my hand wonderfully, and the trigger is easily accessed and is in a location that feels natural to me. Thank you, Crosman!
I told you about thinning the trigger in the first report. I also told you the barrel is shorter, down to 10.75 inches. [Editor's note: You did? I can't find any reference in Part 1 where you told us how long the barrel is.] I originally had plans to shorten and rethread the barrel to put the shroud back in place. I wasn’t able to get the barrel threaded; and different configurations, though effective for the noise level, were not making me happy. I found that the unmodified level of noise is not offensive, anyhow and have abandoned the attachments. The short barrel is simple and manageable. For my style of shooting, ease of movement means making the shot.
I also removed the anti-beartrap safety and can now decock the rifle. I think the ability to dencock is very important and have done so countless times already, so I’m glad I did this. [Editor's note: Removing a safety device like the anti-beartrap device cancels your warranty protection and places the liability for any accidents with the gun squarely on you.]
The trigger modifications improve performance; the shortened barrel improves performance (I believe); the stock that now fits me better improves both performance and appearance. Removing the anti-beartrap device gives me the option of decocking the gun.
Two more performance mods were applied. First, the breech seal was replaced with a nice, thick leather one. I noticed a change in the discharge sound when I did this, and it seems the gun loses no pressure at the breech with the new seal. It may have been losing air with the thin factory o-ring. The difference in contact area of the seal is about 10-fold, so I would hope it seals better!
Second, while the barrel and breech were off the gun, I opened the transfer port by just a hair, maybe one-sixty-fourth of an inch. Without a chronograph, I can only tell you these things haven’t hurt the performance. I believe they’ve probably helped velocity and have definitely helped accuracy. The short barrel and powerful Nitro Piston have the pellets hitting their marks as soon as the trigger breaks.
That brings me to the pellets. I had very little pocket change to scrape together an order of pellets, but I did manage to buy three and get the fourth tin free! I ordered two tins of Beeman Round Nose. I had good luck with Beeman Pointed pellets in a .177 Crosman TR77. At ~3 bucks a tin, these .22 domes work surprisingly well. They’re also very soft, which helps with energy transfer. They were the second most accurate pellet.
The two other tins I bought were JSB Exact Monsters and RWS Superdomes. The Monsters were bought to test the powerplant’s limits with pellet weights. My Ruger Blackhawk Elite spring rifle rebounded when a too-heavy pellet was used, and I wondered if the Nitro Piston powerplant might act the same. It doesn’t. It shoots them smoothly but not very accurately.
The most accurate pellets were the Superdomes. They also seem to run very fast. Again, no chrony, but on a super moist rainy day they were creating supersonic cracks. Shooting in dry weather they did not, so either the moisture lubricated everything to send them supersonic or wet air cracks more easily. Interesting.
The RWS Superdomes shoot like laser beams. Since I bought the NP for small game hunting, I shot a 10-shot, 20-yard group with one extra shot, a first-shot-counts test right out of the bag at a small liquor bottle (not mine, found it on the ground on the way to the shooting spot). That shot went dead-center on the 1.25″x2.5″ body of the bottle. That’s good plinkin’ in my book.
I set up a 5.5″ Caldwell Orange Peel target on the side of an old 4-slot toaster, settled in on the canvas folding sports chair rest and put ten Superdomes in a group that’s covered by a nickel. The hole in the paper target looks quarter-sized, but the holes in the toaster metal show 5/8 inch center-to-center. Two shots opened up the group, but 7 or 8 went into a little under a half-inch group.
All in all, I’m very happy with the NP. With the new stock and short barrel, I can achieve hunting accuracy out to about 35-40 yards using the pellets I’ve tested so far. If another pellet shows up that shoots better, and I keep shooting the gun well, I can see this NP easily shooting an inch consistently at 50 yards.
That’s about it. Besides a little more trigger time and work (it’s still a little creepy), the gun is in top form with no more changes to be made. I’m now just heading out to enjoy the fruits of my labor as often as possible. When I get a chrony, I’ll let everyone know to be on the lookout for part 3. Until then, thanks for reading!
by Tom Gaylord, a.k.a. B.B. Pelletier
The PCP is built on a Crosman 2100B chassis.
I bet that when some people heard about this experiment, they laughed it off. Perhaps that will change now that we have looked at this novel idea 5 different times. I’m learning so much from this series that it’s going to affect my writing for years to come.
I was surprised — again!
Somebody — I don’t remember who — asked me to test the $100 PCP with round lead balls — I guess because the steel BB test turned out so well. So I did. I shot it at 10 meters with .177-caliber Gamo round lead balls. Since I shot with open sights, I didn’t get to see the group after confirming that the first shot hit the paper. Imagine my surprise to see all 10 shots clustered tightly in 0.561 inches!
That got me thinking — a lot! I’ve been doing this experiment so slow that I forget what I’ve done before.
What I thought I would do today was complete this report with a test of the rifle scoped at 25 yards. However, when I mounted the scope, it was very far off line, as in angled to the barrel. Either the grooves on the receiver are off or the scope mount I chose wasn’t grabbing the base correctly.
After missing the target twice at 25 yards, I pulled the scope off the rifle and decided to shoot another test with open sights. I used different pellets than I used in Part 4 so we get to see some different results.
Crosman Premier heavy
The first pellet I tried was the 10.5-grain Crosman Premier heavy. In .177, Premiers come in both lite and heavy, and this is the first time I’ve tested this rifle with the heavy. I would love to tell you these pellets went into a small group, but the truth is that they scattered in a 2.352-inch pattern.
H&N Baracuda Match
Next, I tried 10 H&N Baracuda Match pellets. They made a better group than the Premier heavies, but it still wasn’t worth talking about. Ten pellets went into 2.051 inches at 25 yards.
After looking at the second group, I noticed that it looked like the first group, only a little smaller. Because I always look through the spotting scope after the first shot of every group to make sure I’m on paper, I knew that the first shots of both groups were high and right. It seemed to me that the shots might be spreading out to the left as the pressure in the reservoir dropped; so on group 3, I took a photo after the first 5 shots had been fired.
Finally I tried RWS Superdomes. Including the lead balls I shot at 10 meters, this was the fourth projectile in this test and the seventh diabolo pellet tested at 25 yards in this rifle. The other 3 pellets were documented in part 4.
Ten Superdomes went into 1.528 inches at 25 yards. That was the best group in this test with pellets, but only the third best pellet of the seven that were tested at 25 yards.
As it turned out, the next 5 shots didn’t open the group that much more. So, another theory bit the dust.
The $100 PCP is very accurate at close range, but not as good as the distance increases. Of course, you must remember that the barrel is taped to the reservoir with Gorilla tape, so there’s a lack of precision in the build.
It would still be interesting to see how this rifle behaves when scoped, but I’ll have to find mounts that permit mounting a scope to the integral rail. At this point, I think the $100 PCP is a proven concept. I would really like to see this rifle in production.