Posts Tagged ‘Beeman Kodiak Extra Heavy pellets’
by Tom Gaylord, a.k.a. B.B. Pelletier
This is a third look at the Disco Double shooting at 50 yards. All I’ve managed to do so far is demonstrate the Disco Double is very consistently mediocre with the best pellets — JSB Exact Jumbo RS domes. However, the last time I was out at the range with this rifle, I finally did what the builder, Lloyd Sikes, has been telling me to do all along. He said to tighten the 6 screws on the 2 barrel bands or hangers, and this time I followed his directions. Guess what? Four of the 6 screws were loose! Imagine that! I tightened them and knew the rifle would reward me for the effort.
It was no surprise when shot the best 10-shot group ever with the rifle. Ten RS pellets went into 1.195 inches at 50 yards. But I was 3 shots into a second group when the bolt handle broke off in my hand during cocking. That ended the day for this rifle.
As soon as I returned home, I emailed Lloyd, who put a new bolt and handle in the mail right away. I really wanted to finish the test before leaving for the Ohio airgun show (which is this Saturday), so I disassembled the rifle. I ran into a problem getting the old bolt out, but a call to Lloyd set me on the right path and soon the job was done.
The new parts arrived the following week, and I had them in the rifle inside an hour — though another call to Lloyd was necessary. He was most helpful, and I resolved my problem with a minimum of fuss. The rifle went back together, and I was ready to return to the range.
This time, I took the opportunity to mount a new UTG 6-24X56 scope scope in place of the UTG True Hunter 3-9X40 scope I took off. Naturally, the target image was much larger with this scope, which just made my job easier.
I tried several pellets that I’ve tried before, but once more this rifle demonstrated that it likes the JSB Exact Jumbo RS pellets the best. Since the rifle had been taken apart for the bolt repair (i.e., both barrel bands had been removed), I was back at the beginning on the first group. I had the front band about where it had been before (from the screw marks in the paint), and the first group of 10 went into 1.28 inches at 50 yards. That was marginally better than the 1.317-inch group I’d gotten during the previous full test, but not quite as good as the one group I shot just before the bolt broke (1.193 inches). All the screws were tight, so now it was time to move the front barrel band.
In case you don’t understand what moving the front barrel band has to do with accuracy, it comes down to harmonics. By changing the location of where the barrel is anchored, I changed how the barrel vibrates during the shot. I did a huge 11-part test of this effect a few years ago. You can read about it here.
I moved the front barrel band backwards about a half inch and tightened the 3 screws once more. Then, I fired another group of 10 shots. This time, 10 RS pellets went into 0.816 inches. That’s pretty telling, don’t you think? Of course, I have no way of knowing if I have the barrel band adjusted perfectly — all I know is that it’s better than it was before.
A second 10-shot group went into 1.506 inches. Oops! Was that supposed to happen? Its difficult to say, but perhaps I wasn’t concentrating while shooting this group. I simply don’t know. Stuff happens to me, just like anyone else!
So I shot a third 10-shot group. This one measures 0.961 inches between centers. That’s better.
What I can tell you now is the that Disco Double is able to put 10 pellets into less than an inch at 50 yards under ideal conditions. I’ve shown you everything that’s happened, and I could go on and continue to test this rifle until I have it shooting its best. I probably will, in fact. But the lesson is what I’ve shown you today.
The Benjamin Discovery is an inexpensive PCP that can put 10 pellets into less than one inch at 50 yards under ideal conditions. The Disco Double I am testing for you here has a lot of extra work done to it and is not as inexpensive as the basic Discovery. However, this is the air rifle I wanted. It’s small, it’s accurate, it has a wonderful trigger and this one gets a load of shots on a fill of just 2,000 psi. That’s everything I wanted in a PCP.
Best of all, this rifle weighs no more and is no larger than a standard Discovery. Despite the additional air capacity, I had to sacrifice nothing. That was the real reason I had this air rifle built. Lloyd Sikes has a wonderful thing going here. If you’re interested in what he can do for you, find him at Airgun Lab.
by Tom Gaylord, a.k.a. B.B. Pelletier
Let’s look at the velocity of the BSA Supersport SE. The factory advertises 750 f.p.s. for the .22-caliber rifle I’m testing. I just hope that’s with lead pellets.
I mentioned in Part 1 that the rifle cocks a little on the heavy side. I estimated 40 lbs. of effort. On my bathroom scale, this one actually requires 39 lbs. to fully cock the rifle. My gut tells me that some of the effort is the tightness of the new gun and will probably decrease by a few pounds over time.
I cannot resist making a comparison with the Beeman R9, which is also sold as the HW 95. The size and power of this rifle seem to align with that classic, but shooting will tell us the whole story.
The first pellet I tested was the RWS Hobby – a lightweight lead wadcutter that’s used to test the legitimate velocities of all airguns. By legitimate, I mean that there are many lead-free pellets that may go faster; but since very few of them are accurate, they probably won’t be used by many shooters.
Hobbys averaged 717 f.p.s. from the test rifle. But the velocity spread was large — from a low of 695 f.p.s. on the final shot to a high of 731 on shot three. That’s 36 f.p.s., which is a bit high for a springer — especially these days when many new spring guns come out so well adjusted.
At the average velocity, Hobbys generated 13.59 foot-pounds of muzzle energy. Hold your comments, however, because I noted in Part 1 that I thought this rifle might have a heavy piston (or top hat) that I said could make it shoot better with heavier pellets. So, let’s try one.
The next pellet was the 21.14-grain Beeman Kodiak — a heavyweight if ever there was one. Kodiaks averaged 535 f.p.s. in the test rifle, and the spread was just 12 f.p.s. It ranged from 527 f.p.s. to 539 f.p.s. At the average velocity this pellet produced 13.44 foot-pounds of muzzle energy. Not as much as the Hobby, but very close. And the tight velocity spread leads me to suspect I was right about the piston. I think the Kodiak has earned a spot in the accuracy test.
We need to see what a medium-weight pellet can do in the Supersport SE, and the RWS Superdome is a fine one to try. At 14.5 grains, it sits right in the middle of the weight spread — especially in the range of pellets that should be considered for this rifle.
Superdomes averaged 661 f.p.s. in the Supersport. Since we know the “magic” number is 671 f.p.s. — where the weight of the pellet in grains equals the muzzle energy in foot-pounds — we are very close to that level. This rifle must therefore produce a shade less than 14.50 foot-pounds with this pellet. And it does! It produces 14.07 foot-pounds of energy at the muzzle — the highest energy of the three pellets tested.
The total velocity spread for the Superdome was 16 f.p.s. Therefore, the 2 heavier pellets did better (shot more stably) than the lightweight Hobby. I’ll keep that in mind as I test the rifle for accuracy. Yes, I will test it with a scope; but since it comes with a nice set of open sights, I plan to first test it with them.
The rifle cocks smoothly and without the normal noises I associate with a new spring rifle. And when it fires, there’s no objectionable vibration, as long as you hold it lightly.
The trigger is reasonably crisp. It breaks at 2 lbs., 14 oz., which is light but not overly so. I also really like the fact that the safety is manual.
Last comment. The Supersport SE feels very “old school” to me. It isn’t overly powerful. It has a smooth cocking and shooting sequence. And the size and weight of the rifle feel very nice. I’m so tired of those oversized breakbarrels that make me feel like I’m a kid shooting dad’s big shotgun for the first time. The Supersport SE feels just right.
by Tom Gaylord, a.k.a. B.B. Pelletier
This is a second look at the Disco Double at 50 yards. On this day at the range, the wind was quiet, so it was a good day to test.
I didn’t do anything to the rifle before this test because I didn’t have any time to stop long enough to clean the bore. So, it went uncleaned. I may have promised to do certain things before the next test, but all I actually did when the time came was grab the rifle and go back to the range.
I used the same black single sandbag you saw in the Daisy model 8 test earlier this week. The Disco Double perfectly fits the long groove of that bag and feels more secure than if it was in a conventional rifle rest.
The first group was made with 10 Beeman Kodiak pellets, and they were on target since I’d already zeroed this rifle at 50 yards for the earlier test. They initially stayed together, and I thought the rifle might have turned the corner. They then began to fly farther and farther apart. In the end, 10 pellets went into 1.837 inches — hardly a group worth mentioning. When I checked back to the previous test, though, I noted that this same pellet had made a group that was 2.458 inches at 50 yards; so as bad as it is, this was an improvement.
Okay, that wasn’t the brilliant opening I was anticipating. Even though the same pellet beat the last group by half an inch, it didn’t seem like the time to gloat. Next up were the JSB Exact Jumbo RS pellets — the most accurate pellets in the first 50-yard test.
The first group was another teaser. It looked small through the scope. It wasn’t until I measured it that I found out it went over an inch. Ten RS pellets went into 1.317 inches at 50 yards. That’s smaller than the smallest group from the previous test. There, 10 RS pellets went into 1.3418 inches at 50 yards. This group is similar, but it’s not crushingly better by any means.
I now have 2 groups — each of which is better than the same pellet in the previous test. One is significantly better; the other is only better by a whisker. What does that mean? Rather than try to answer that question, I decided to shoot another group. Surely, this one would be conclusive!
The next 10 RS pellets went into a 1.773-inch group. That was the hands-down worst group of both days of testing for this pellet. On the same day, shooting under the same conditions with the best pellet, I got both the best and worst groups this rifle had fired to date.
I’m sure someone can make sense out of these results — but I’m not that person! After 2 days of testing at 50 yards, I had not proven anything except that I can’t make this air rifle shoot — yet!
I considered shooting some more groups; but after looking at these results, I thought this wasn’t the day. Sometimes, the bear gets you!
I think what I’ll do is drag the Disco Double to the range every time I go and try to shoot different pellets each time. Maybe then I’ll stumble across the magic pellet that turns this rifle into a shooter. After testing similar rifles, I’m convinced this gun can shoot — I just haven’t yet discovered how.
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, we’ll look at the Disco Double out at 50 yards. I used the best pellets from the 25-yard test to speed up this test. No sense going over the same ground twice.
The first pellet I tried was the JSB Exact Jumbo RS. It did the best at 25 yards, plus it’s so light, at 13.43 grains, that it gives the rifle a little extra zing.
The rifle arrived at the range filled to 2,000 psi, so I went right to work. I clicked the scope up 5 clicks in elevation to account for the greater distance and began shooting. The day was surprisingly cold — about 28 degrees F. My trigger finger had very little feeling, yet I was able to feel when stage 2 engaged on the trigger every time. That’s important on this rifle because the trigger is very light on stage 2.
There was no wind on the range, which made this a perfect day for shooting a pellet rifle. The first 10 shots went into 1.558 inches between centers. That’s not as small as many 50-yard groups you’ve seen me shoot, but let’s keep testing.
Next up were .22-caliber Crosman Premiers. The first 3 shots went into 2.269-inches and I stopped shooting. These pellets weren’t going to work at 50 yards.
JSB Exact, 15.89 grains
Next up were the heavier 15.89-grain JSB Exact Jumbos that looked promising at 25 yards. They produced a 10-shot group that measured 1.778 inches between centers. It was a little larger than the JSB RS pellet group at 50 yards, just as it was a 25 yards. So far, no prize.
The last pellet I tried was the Beeman Kodiak, which just did fair at 25 yards. Here at 50 yards, they put 10 into 2.458 inches. That’s hardly accurate! I almost stopped shooting this group when I saw how the shots opened up; but I thought that after doing that with the Premiers, I ought to let one go the distance just to show you what it looked like.
Back to the JSB Exact RS
I wasn’t finished with the testing just yet. The rifle was topped off at 2,000 psi again, and I went back to the pellet that was giving me the best results — the JSB Exact RS. The next group of 10 was the tightest of the session, at 1.318 inches between centers. I’d adjusted the scope for the Kodiaks, so this one landed below the bull.
I then shot 2 more 10-shot groups with the RS pellet. The first measured 1.522 inches, and the second measured 1.543 inches. When I examined the target after bringing it back from downrange, I saw a pattern. The RS pellet wasn’t giving tight groups, but they were very consistent. Out of 4 groups, the total variance was 0.24 inches — from 1.3 to 1.5 and change. That’s pretty consistent.
What do we know?
We know this Disco Double can put 10 pellets into 0.365 inches at 25 yards. And with the same pellet, we know that it opens up to about 1.5 inches when the distance is doubled. We know it was warm when the 25-yard target was shot and cold when the 50-yard targets were shot.
And that’s about the only difference — other than I did remove the TKO silencer after shooting 25 yards. I think what I will do next is the following.
1. Clean the barrel.
2. Shoot 5 groups at 25 yards with the JSB Exact RS pellet.
3. Clean the barrel again.
4. Shoot another 5 targets at 50 yards.
One last feature I want to show you is the special optional barrel band Lloyd makes for the Disco Double. It has a Picatinny rail on the bottom, allowing you to attach a bipod at just the right spot with very little extra weight added to the gun.
When I originally tested the .22-caliber Benjamin Discovery rifle in 2007, it was a pre-production prototype that was made out of a Crosman 2260. I shot several approximately half-inch groups at 50 yards with Crosman Premier pellets, but they were 5-shot groups. Now, I’m shooting 10-shots groups that I know are going to be larger. I didn’t use the JSB Exact RS pellet because it didn’t exist back then.
I believe this lightweight Disco Double has more accuracy than we’ve seen to this point. I think it must be capable of shooting at least one 1-inch group out of 5 at 50 yards. So, the test continues.
by Tom Gaylord, a.k.a. B.B. Pelletier
Length of pull
Before we begin, I want to say a word about the length of pull you get with this adapter. I gave the range of lengths in Part 1 as 14-1/8 inches to 17-1/8 inches, and that turned off many readers. In terms of conventional stocks, that pull range is very long! But Dave Rensing, who invented this adapter, made it for his 8-year-old son and his 7-year-old daughter. The son uses it conventionally, but the daughter collapses the stock past the first detent so it’s even shorter. Fully collapsed, the pull length measures exactly 14 inches but feels like 11 inches.
The AR adjustable stock is not very ergonomic. It stretches and contracts okay, but it doesn’t move in the other directions. It’s a one-size fits none kind of deal — at least from a rifle marksmanship standpoint. While it works very well for fast maneuvering and climbing in and out of tight places, your body has to adapt a lot to make it work.
On the other hand, when the R.A.I. adapter is added to it, the stock becomes almost universal! You can adjust the positions of the comb and the angles of the buttstock through a wide range of attitudes and make it fit almost anyone — young or old. I found when shooting from the bench that even the 15-1/8-inch pull I had initially set up was too short. I had to move the stock back until the pull was 15-7/8-inches before it felt natural again. However, in the offhand position, the 15-1/8-inch pull is the right one. That demonstrates why the adjustable stock works so well on this pistol! You can adjust it to whatever you need in the blink of an eye.
I discovered why this is. The AR adjustable stock has no width. The narrow tube is where your cheek rests, so your eye is closer to the centerline of the pistol than it would be with a conventional stock. The stock also does not drop at the butt, so your head thrusts forward farther than it might with a conventional stock. Instead of sticking up to rest on the cheekpiece, your head tilts forward, along the straight tube. Hence, 14 inches feels more like 11 inches. The Marauder’s pistol grip and close trigger enhance this feeling.
Scope and mounts
I wanted to test the pistol with a really good scope; and the last time I tested the Marauder I used a CenterPoint 3-12X44 compact scope. Leapers was making CenterPoint scopes back then, so this time I attached a UTG 3-12X44 compact scope. My scope is older than the one I linked to, but the optics and overall size are the same. Not only does this scope fit the carbine very well, it gives a crystal clear sight picture that makes aiming so easy.
I needed to get the scope high off the receiver because the Marauder pistol has a circular 8-shot magazine that sticks up above the receiver top. You can see it in the above photo. Also, the stock’s straight line puts my head higher than it would normally be. So, high scope rings are in order. I selected a pair of BKL 30mm high rings that have a single-screw top strap. The Marauder pistol doesn’t recoil, so these rings can be made thinner and still be strong enough to hold this scope. Once they were mounted, I noted they brought the scope’s exit pupil directly to my eye, making them the perfect height.
Testing the Marauder carbine
I tested this Marauder pistol extensively, back in 2010/2011. I already knew the right fill pressure (2,900 psi), the best pellet (.22-caliber Beeman Kodiak) and the effective number of shots per fill (32). Since it has an 8-shot magazine, I shot 8-shot groups instead of 10.
Sight-in went quick, and then I backed up to 25 yards and started shooting. The first group of Kodiaks was the second-best of the session, putting 8 into 0.554 inches. Looking back at the tests I did years ago, I wasn’t shooting as well on this day as I did back then. I shot a total of six 8-shot groups, and the largest one was 0.607 inches, while the smallest was 0.504 inches between centers.
While these groups are okay, they aren’t as small as the groups I shot previously. I don’t think it was me or the gun. In this case, I think it was the pellet. I used a different tin of Kodiaks in 2010, and they grouped much tighter in this pistol than these did. The best group back then was 0.405 inches between centers. Maybe they had larger heads, or maybe they were just different in some unquantifiable way.
I tried a number of different pellets in the Marauder pistol, but none of them did very well. JSBs of various weights, which I thought would do well, sprayed all over the place. I know from testing the gun that it wants a fat pellet, and the Kodiak is a good one for that. It’s slow, at an average 584 f.p.s., but even at that it produces about 16 foot-pounds of muzzle energy. That’s pretty good for an air pistol! Certainly enough for some hunting and pest elimination.
The rest of the test
I plan to take this pistol to the 50-yard range, so you’ll see the results of that. But I don’t think that’s quite the right way to test the R.A.I. adapter and adjustable stock. We already know how well the pistol performs. Now, we want the focus to be on the adapter and the stock.
Maybe I can put the gun in the hands of some other shooters and see how well it fits them. Perhaps, that’s the best way to evaluate this item. I don’t know, but I guess we’ll see.
by Tom Gaylord, a.k.a. B.B. Pelletier
Benjamin Marauder .177 caliber: Part 1
Secrets of loading the Benjamin Marauder magazine
Fixing a Marauder magazine
Benjamin Marauder .25 caliber: Part 1
Benjamin Marauder .25 caliber: Part 2
Benjamin Marauder .22 repeater with synthetic stock: Part 1
Benjamin Marauder .22 repeater with synthetic stock: Part 2
Benjamin Marauder .22 repeater with synthetic stock: Part 3
Benjamin Marauder .177 caliber 50-yard test: Special part
Benjamin Marauder .22 repeater with synthetic stock: Part 4
Today, we’ll look at the Marauder’s accuracy at 50 yards. I had to wait a long time for a calm day at the range for this.
Clearing the air
Before I begin the report, though, I want to address something. The new Marauder — both the one with the synthetic stock and the one with the wood stock — are the same rifle in different stocks. The actions are identical. Crosman waited to bring out the wood-stocked model, but both rifles have the new set-back trigger and also the new valve and hammer depinger. Which brings me to my second comment.
Owners who have used the new Marauder seem to like it a lot. They praise it in their comments on the product page. But those who don’t own one are making comments such as, “Tom Gaylord said the new .22-caliber Marauder only gets 860 f.p.s. Where is the 1,000 feet per second that Crosman claims? And where are those extra shots?”
Let me make this very clear — Tom Gaylord DID NOT say that the new Marauder only gets 860 f.p.s. What Tom Gaylord did was test the new Marauder exactly as it came from the box. He discovered that his test rifle seems to like a 2,900 psi fill, instead of the 2,500 psi fill suggested in the owner’s manual.
Tom Gaylord shot his test rifle at 25 yards and showed you the accuracy the rifle got when filled to that pressure. Today, he is going to show you how well it does at 50 yards, and it will also be filled to 2,900 psi.
This is a pet peeve of mine. When people read all the performance specs of an airgun, they lump them together as though the gun does all of them simultaneously. The new Marauder may very well get 12 percent more shots per fill because of the new valve. And it may very well shoot a .22-caliber pellet at 1,000 f.p.s. And it may also be very accurate. And very quiet. But don’t expect it to do all of that at the same time — just as you don’t expect a new Corvette to go 0-60 in 4 seconds and also get 21 miles per gallon. You get one or the other — not both at the same time.
I haven’t even adjusted the gun to see how fast it will shoot. And I haven’t played with the fill pressure, either. All I’ve done to this point is take the rifle out of the box, put a scope on it and test it for accuracy. During that testing, I’ve accomplished several things:
1. I know the best fill pressure of the test rifle as it stands right now — 2,900 psi
2. I know the most accurate pellets — 14.3-grain Crosman Premiers and Beeman Kodiaks.
3. I know that for top accuracy, I can count on getting 2 full magazine’s worth of shots on a fill — 20 shots.
Now, don’t go running around claiming that I just said the new Marauder only gets 20 accurate shots. What I said was for top accuracy I can count on getting 2 full magazine’s worth of shots. There are a lot more than 20 accurate shots in this rifle!
If you’ve been following this report, you know that I’ve eliminated several pellets during earlier testing. They didn’t hold up to the 2 I chose for this test. That’s not to say there aren’t other pellets that might outshoot these 2 — just that, of the pellets I’ve tested, these are the best.
Testing at 50 yards
The day was completely calm — perfect for this kind of test outdoors. I shot the rifle off a sandbag rest. The first group was with Crosman Premiers, the pellet that proved to be the most accurate at 25 yards.
Since I didn’t know when the wind might kick up, I went fast in this test. There were 2 other air rifles to test on this day, and one of them was the Double Disco that shoots the same velocity as the Marauder. I wanted to complete this test so I would have time for that one afterward. I also had an AirForce Escape to test; but given how powerful that rifle is and also given the heavy weight of the .25-caliber pellets I’d be shooting, I thought that one could endure a little breeze.
At 50 yards, 10 Premiers went into a group that measures 1.112 inches between centers. It’s a reasonably round group that has 7 of the 10 shots in 0.558 inches. There’s nothing wrong with that!
Next, I shot a group of 10 Beeman Kodiaks. This was on the same fill as the Premiers. Again, I was going fast to finish before the wind kicked up, so I didn’t stop to adjust the scope. Ten Beeman Kodiak pellets went into 1.516 inches at 50 yards, with 9 of them making just 0.888 inches. As with the Premiers, this group was also reasonably round.
Here comes the wind
When I finished the Kodiak group, the breeze was just starting to blow. I refilled the Marauder and tried one other test pellet that I’m evaluating for Pyramyd Air, but it didn’t do very well. So, I ended the test for the Marauder.
The new Marauder is very accurate. This test shows that clearly. As far as the absolute top velocity it can get or anything else, I still have to test that.
In my opinion, the new Marauder shoots as well as the old Marauder did. I do like the new synthetic stock for its slim profile and lighter weight; but as far as accuracy and quietness goes, I don’t see any difference between the new rifle and the old Marauder.
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, we’ll look at the accuracy of the Disco Double. Before that, however, I mounted a scope, a TKO airgun silencer that they call a muzzlebrake or a lead dust collector, and something I’ve never seen in print before but something I’ve used on many precharged air rifles over the years — a bolt keeper!
What’s a bolt keeper?
First, let me tell you that when I mounted the TKO silencer, it fit the barrel perfectly. There were no barrel alignment issues that I was warned about, and I checked closely. This unit is very well made and looks beautiful on the gun. The unit I’m testing is 8-1/4 inches long; and, yes, Lloyd, I checked that it indeed is a .22 caliber before mounting it. However, when the silencer is on, the top end cap does not fit.
When I shot the gun with it on the first time, I have to say I was underwhelmed. It was quite loud. A second shot confirmed this. Then, I held the rifle to my shoulder and fired a third shot. That’s when it hit me — a blast of air in the face not unlike the glaucoma test eye doctors do. The bolt was opening and discharging compressed air with each shot!
This happens a lot with precharged guns and it doesn’t matter how cheap or expensive they are. The bolt handle lifts up and air comes back through the action. On the lightweight Disco Double, it only begins to happen when the rifle is at the bottom of the power curve, which is where it was when I tested it this time.
A simple fix is to fasten a rubber band around the bolt handle to hold it closed during the shot — a bolt keeper. Once on the gun, I just leave it there. Even though it’s not needed until the end of the power curve on this rifle, I don’t want to worry about it. You can cock and load the rifle with the band in place.
With the handle held closed in this fashion, the rifle suddenly became very quiet — as in Benjamin Marauder quiet! I now understand why shooters have been so excited about this unit. It really works!
NOTE: Due to several reader questions about this silencer, I am removing it from the rifle and returning it to Lloyd. Silencers are a very touchy subject, since owning one that will function on a firearm requires a license for each specific silencer. I don’t want to mislead any reader, so in the interest of clarity I am simply not going to use or possess this item any longer. I wrote an article on silencers that can be accessed here. If you have any questions on the subject, I recommend you read that article.
The rifle now weighs 6 lbs., 11 oz. with everything installed. That’s very light for a serious air rifle.
I mounted a UTG True Hunter 3-9X40 scope on the rifle. Since UTG packs rings with this scope, I used them, but they’re Weaver-style mounts. So, I had to use a UTG Weaver to 11mm dovetail adapter to make them fit the dovetails on the rifle’s receiver.
I’ll be shooting from a rest at 25 yards today. The range is indoors, so wind is not an issue.
Sight-in was accomplished with .22-caliber Crosman Premiers; so after I was on the paper, I shot the first group of 10 shots at 25 yards. The hole they made is a little taller than it is wide, but it measures 0.569 inches between centers. While that’s okay for 25 yards, it isn’t great. I’d like to see something a couple tenths smaller.
Next up were Beeman Kodiak pellets. They’re identical to the .22-caliber H&N Baracuda pellets that Lloyd tested the rifle with, and they were what I had available. They put 10 into 0.655 inches between centers. Like the Premiers, that’s not bad…but not as good as I’d hoped.
Beeman Kodiaks opened up more, to 0.655 inches between centers. Only use them if you need a heavy pellet.
JSB Exact RS
I followed the Kodiaks with some JSB Exact Jumbo RS pellets. They’re even lighter than the Crosman Premiers, and sometimes they can be very accurate in precharged rifles. This was one of those times. Ten pellets went into 0.365 inches, which is exactly what I’d hoped for the Disco Double. This is the pellet for this rifle!
Nex, I tried the RWS Superdome pellet that’s always recommended. I don’t often have good luck with them, but a lot of shooters do. I stopped after just 4 shots, though, and you can tell from the lateral spread that measures 0.634 inches between centers that they weren’t going to perform.
JSB Exact Jumbo
The last pellet I tested was the JSB Exact Jumbo. These are usually among the top pellets in .22-caliber precharged air rifles, so I felt they deserved a chance. The first 2 shots were on a fresh 2,000 psi fill, and I’m not sure the rifle wasn’t overfilled by a slight amount because they both landed away from the main group. Shot 9, however, was shot while the rifle was grouping well, and I have no idea why it’s above the main group. The 10-shot group measures 0.647 inches between centers, making this the second-best pellet I tested in the rifle.
These 10 JSB Exact Jumbos measure 0.647 inches between centers. The first 2 shots are the holes at the right and bottom right of the main group. Then, the rest of the pellets went into the big group, except for shot 9 that went high. There is no explanation for that one. This is a pellet I would keep trying.
Filling from a hand pump
The biggest feature of the Benjamin Discovery, aside from the low price, is the fact that the maximum fill pressure is just 2,000 psi. It’s full right where other PCPs have run out of air. And that makes the Discovery extremely easy to fill with a hand pump.
Using the Discovery factory pump, I began the fill at just under 1,000 psi and pumped until the onboard pressure gauge read 2,000. It took exactly 100 pump strokes to fill the gun; and, until the final 20, they were as easy as inflating a bicycle tire. Only when the pressure passed 1,800 psi did I notice an increase in pump handle resistance.
One tip when filling with a hand pump is to go slow. Allow time at the top and bottom of each pump stroke for the air to flow through the various stages inside. If you don’t, you just waste energy and heat up the pump unnecessarily.
Observations so far
So far, I’m thrilled by the performance of the Lightweight Disco Double. The number of shots I get on a fill is large enough for serious shooting before it’s time for a refill and the rifle’s performance leaves nothing to be desired. A glance at the onboard gauge needle, and I know the status of the fill.
When I tested the original Benjamin Discovery rifles in both calibers, the guns I used were pre-production prototypes. I shot groups under 0.6 inches with both calibers; but at that time, I was shooting only 5-shot groups. The JSB Exact RS pellet did not exist at the time of that test. So, it’ll be interesting to see what this rifle can do at 50 yards with 10 shots. Remember — this is the first Benjamin Discovery production rifle I’ve ever shot!