Posts Tagged ‘multi-pump pneumatic’
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, we’ll look at the velocity of the Daisy 880 multi-pump pneumatic. The test didn’t go as I expected it to, so stick around and learn something new with me.
Oil the pump head
Before I started the test, I oiled the 880′s pump head with several drops of Crosman Pellgunoil. I do that whenever I want to get the maximum performance from a multi-pump pneumatic, because the oil seals the pump head, allowing it to build more pressure.
First test — velocity per pump stroke
This is a test I recommend to all multi-pump owners. You test the velocity of your gun with differing pump strokes — from the lowest number recommended in the manual, which is 2 in this case, to the highest number, which is 10. [Note: In part 1, I stated that the minimum number of pumps was 3. It's actually 2, and the Pyramyd Air website has been corrected to reflect that.] For this test, I also did 11 and 12 pump strokes to see if the gun had even more velocity. The results were revealing. I’ll discuss them in a moment.
The pellet I used was the 7.9-grain Crosman Premier dome. Any pellet will do, but it helps if you always pick the same one in case you ever want to compare one gun to another.
* No air remaining in the gun after this shot.
For those who may be new to multi-pumps, notice that as the number of pump strokes increases, the amount of the velocity increase grows smaller. If you were pumping the gun, you would have noticed that after the fourth pump stroke (from 5 strokes on) the pump handle jumped out when I pulled it for the next stroke. Compressed air is remains in front of the pump head and does not enter the gun’s reservoir. As the pressure inside the reservoir builds, it holds the inlet valve closed a little harder each time; so, more compressed air fails to enter the reservoir. This phenomenon is common to all multi-pumps, and many of the more expensive ones have (or used to have) adjustable pump heads that minimize this; but the 880 doesn’t have any adjustment.
Note that there’s no air remaining in the gun after a shot was fired on 10 pumps. That means the gun is able to exhaust all the compressed air. From the velocity chart, we learn there’s no value in pumping the gun more than 10 times.
This is where I learned a couple big lessons about the 880 — or at least about my 880. Normally, a multi-pump is very consistent. The same number of pump strokes will give nearly the same velocity every time, as long as the same pellets are used. I’m used to seeing a velocity variation of about 5-8 f.p.s. over a 10-shot string. But not this time!
The 880 gave an average of 469 f.p.s. for 10 shots with 5 pump strokes. If you look at the string before, however, you’ll see that this velocity is well below what I got with 5 pump strokes (530 f.p.s.) and the very same pellet. Even stranger is the fact that, on this test, the velocity spread went from a low of 441 f.p.s. to a high of 502 f.p.s. That’s a variation of 61 f.p.s. over 10 shots. And not one of those 10 shots went as fast as the same pellet did on 5 pump strokes in the previous test!
The Daisy 880 varies greatly in velocity from test to test. You may think this is because my 880 is an older one. I can’t argue that. If you want to run the same test with a more modern 880 and submit your results, I’d be glad to see them, but please back up any claims you make with chronograph results.
RWS Hobby pellets
Next, I tested the rifle with RWS Hobby pellets fired on 10 pumps. These pellets averaged 600 f.p.s.; but, once again, the spread was very large. The low was 559 f.p.s. while the high was 643 f.p.s. That’s a variation of 86 f.p.s.
How fast will it shoot?
I tried a string of Crosman Super Sonic pellets on 10 pumps. They averaged 690 f.p.s. Again, the spread was very large — from 648 to 722 f.p.s. That’s 74 f.p.s. I only did this to see how fast the gun could shoot. The owner’s manual online says the maximum is 715 f.p.s with pellets, and we saw just a little more. So, that claim is right on.
Finally, I tried the rifle with Daisy Premium Grade BBs. On 5 pumps, they averaged 578 f.p.s. with a low of 565 and a high of 586 f.p.s. On 10 pumps, they averaged 644 f.p.s., with a low of 632 and a high of 657 f.p.s. So the gun is much slower than advertised (750 f.p.s.) with BBs, but the velocity spread is a lot less than it is with pellets.
I was surprised by the large velocity variation I saw with the 880. This is not just the largest variation I’ve ever seen with a multi-pump, it’s many times larger than the next largest variation. Multi-pumps are very consistent, in my experience.
Will this large variation have any affect on accuracy? Probably not at 10 meters, but it almost certainly will at 25 yards. I plan to shoot the rifle at both distances, so we shall see.
by Tom Gaylord, a.k.a. B.B. Pelletier
Blog reader Rob asked for this review. I have reviewed the Daisy 880 before, but that was back in the days when I wrote The Airgun Letter. I doubt many of you will have seen that report. I’ve reported on the Daisy 22X, as well, but that was long ago and those reports may be difficult to locate. The 22X and 177X are derivatives of the 880 powerplant.
The 880 is a multi-pump pneumatic that has a short pump stroke. As a result, it’s relatively easy to pump up to the maximum 10 pump strokes. The useful range of pumps lies between 3 and 10 strokes.
The 880 shoots both steel BBs and lead pellets through its rifled steel barrel. At 10 pumps, Daisy rates the rifle at 715 f.p.s. with lead pellets and 750 f.p.s. with steel BBs. Naturally, I’ll test both for you.
The 880 is one of a very few airguns that comes up in conversation whenever airgunners are remembering their favorite guns. It’s lightweight, easy to operate and inexpensive, so there are a lot of them out there. But the attraction goes a lot farther than just a rare bargain. There’s something about the 880 that inspires fierce owner loyalty.
The rifle I’m testing for you is about 13-14 years old, but it probably has fewer than 500 shots on the clock. After testing it initially, I never really went back and used it much. That’s not a comment on the quality — I just never had the time to go back. But I do note that I kept it all these years, and that says something. Every year or so, I get a question about the 880 that makes me drag it out of the closet for a closer look. And this time, I plan to look at it intently, as Rob requested.
My rifle is old, but the specs haven’t changed much since it was built. I have the same red fiberoptic front sight that they still put on the gun and a non-fiberoptic rear one. The weight of 3.1 lbs. is still the same. And the basic functions of a single-shot pellet feed (loaded manually into the bolt trough) or a 50-shot BB magazine, with its feed to a magnetic bolt tip when the gun is cocked.
Speaking of cocking the rifle, you must do it to pump the gun. The design is such that if the gun isn’t cocked, the pump strokes will not pressurize the reservoir. This means the 880 and all associated models cannot be stored with a pump of air in the reservoir. Theoretically, this can be bad for the seals — exposing them to the dirt in the air — but neither my 880 nor my 22X have ever shown signs of a problem. So, this system works, too.
When you pull the pump handle all the way forward, the pump head is exposed in the slot beneath the forearm. This is where you periodically oil the head to maintain compression. The felt washer behind the pump head evenly spreads the oil around the compression chamber walls.
Things people like about the 880
Accuracy is the No. 1 thing owners have to say in praise of the 880. They way most of them talk, I’m expecting something really impressive. The second thing they like is that it also shoots BBs. That’s a turn-off for me, but Daisy sells a lot of these rifles, so I’m not the normal customer.
Those who like the BB aspect also like the fact the rifle is a repeater with BBs. So, Daisy listened to their customers when the 880 was designed.
Things people dislike about the 880
A lot of owners criticize the plastic, saying they think that it might break with use. It might break, I suppose; but when you look at customer reviews for the 880, parts breakage isn’t one of the big things mentioned. I think this is more a question of perception rather than a real problem. One writer thought the 880 should be made in a higher-quality version for adults; but when Daisy did that (it was called the 22X), it didn’t sell well. It’s obsolete, while the 880 continues to sell very well. Perception and reality are not the same.
They also criticize the single-stage trigger. Yes, it’s heavy and creepy. But no more than the triggers on similar air rifles made with the same level of performance. If you want good triggers, you need to buy the kind of airguns that have them.
Pellets can be difficult to load in the 880. The reason seems to be the hole at the rear of the pellet trough that allows BBs to pass through. It can catch the skirt of a lead pellet and make it hang up.
The rifle is mostly plastic on the outside. That carries through to the inside, as well. To stay in this price range, a lot of economies need to be addressed, and molded plastic parts are one of the solutions. That doesn’t mean the plastic is weak or inferior in any way. I’m pretty sure these guns last a long time.
On the other hand, the steel barrel is a very thin tube. It’s an insert that’s housed inside a plastic sheath that’s covered by a thin sheetmetal cover.
We have a real classic pellet rifle to test. There are millions of 880s in circulation, and I expect to hear from a lot of their owners as this report progresses.
by Tom Gaylord, a.k.a. B.B. Pelletier
I’m retesting an airgun that I tested over a year ago. One of our readers called Daisy and said he was getting much better accuracy from his Daisy model 35 multi-pump air rifle than I had gotten in my test, and he asked Daisy if they would look into it. Well, they read the accuracy report (Part 3) and agreed with him that I should have gotten better accuracy than I did. So Joe Murfin, Daisy’s vice president of marketing, called and asked if I would be open to a retest.
Joe told me that Daisy engineers were getting groups of about 1.25 inches to 1.5 inches at 10 meters. I’m sure he meant 5-shot groups, and of course I shoot 10-shot groups; still, his groups were significantly smaller than what I’d gotten from the last gun. My 10-shot groups were in the 2.5-inch to 3-inch range.
I don’t like to retest
Normally, retesting airguns leaves me cold. My philosophy is that I test what users get, and it’s whatever it is. I look at the gun the same way a user would, except that I may know a few more things than the average user and am able to do things most people wouldn’t think to do. That gives the gun a fair test and also educates people who may learn a new trick or two by reading what I’ve done.
I have to admit that over the past year I’ve learned a lot about accuracy with diabolo pellets and the things to look for. More recently, I have become aware of the tremendous accuracy potential of some smoothbore airguns. From that standpoint, a retest of this smoothbore airgun is warranted.
This is not life-saving equipment, and the outcome isn’t that important in the grand scheme of things; but wouldn’t it be nice to know if this $35 airgun is really better than we initially thought? I agreed to retest the gun, and Joe sent one directly from Daisy. Instead of the black stock I had last time, this new gun is finished in camo. Other than that, though, it’s identical to the gun I tested before.
Upon reviewing the last accuracy test, I see I used the 7.9-grain Crosman Premier pellet, RWS Hobby pellet and some vintage Daisy Superior Match Grade pellets I had laying around. At the time, that sounded like a good idea; but after spending more time with the Diana 25 smoothbore in recent months, I think there are some other pellets I ought to try — namely the JSB Exact RS pellet and the RWS Superdome.
In the last report on the model 35, I wasn’t specific about what number of pumps to use for each shot. There was nothing to go on for this test except my experience with other multi-pumps. I would only be shooting at 10 meters, and high velocity wasn’t necessary. Six pumps sounded good to me, and that’s what I used for every target. If this was a larger, more powerful multi-pump, I might have opted for 5 or even 4 pumps, but the Daisy 35 is pretty small, and 6 sounded about right.
First target revealed loading problems
I shot the first target with JSB Exact RS pellets. They did well for the most part, but 3 shots landed apart from the main group. I was having difficulty loading the gun, and I think I may have loaded several pellets backwards because of how easily they flipped around on their own in the loading trough. I was shooting in a dark place to overcome the fiberoptic open sights and was unable to see the breech when the pellet was loaded. Those 3 stray shots might be explained as loading errors. Before I move on, I should note that the size of this first 10-shot group is close to what Daisy told me to expect from 5 shots at 10 meters.
Nothing to do but shoot another group with the RS pellets — making sure each pellet went into the breech the right way this time. I used a portable spotlight to shine on the breech during loading to see which way the pellets were oriented. I think Daisy could spend a little time fixing this problem because that loading trough is almost too small to work with.
The second group was much better. Ten more JSB Exact RS pellets went into 1.108 inches. This is better than what Daisy told me to expect, and my interest was piqued. How good would this gun get?
The second pellet I tried was the RWS Superdome that so many people love. The first 10 pellets made a 1.119-inch group. It’s actually too close to the second group of RS pellets to see the difference, but that’s what the caliper read when I measured it. And these pellets hit the target in approximately the same place as the JSBs even though they’re heavier.
The second group of Superdomes wasn’t quite as tight as the first. One stray pellet that I hesitate to call a flier landed below the main group, opening it up to 1.243 inches. But that’s still the best that Daisy said to expect from this gun!
But wait –
Well — there you have 4 groups that are all significantly better than any of the groups I got in the last test. The Daisy model 35 can shoot after all — just like our reader said. I wondered if there was any more accuracy beyond what the gun had already delivered. So, I fired a fifth group, this time with JSB RS pellets. Instead of 6 pumps per shot, I gave it the full 10 pumps for each shot. This time, they all landed in 0.76 inches, or as close to three-quarters of an inch as it’s possible to get.
Obviously, using the right pellets made all the difference in the world. That’s a lesson I’ll try not to forget. Even an inexpensive airgun like the Daisy 35 deserves a fair chance to perform its best.
I would love to press the 35 into service as a dart gun, but the tiny breech prevents the loading of darts. I may be able to load them through the muzzle, but you’ll have to wait to find out because I seem to have misplaced my .177-caliber darts. But there’s still 25 yards to test, so you haven’t seen the last of this airgun.
by B.B. Pelletier
Yesterday, I told you that today’s test was coming; but because I needed to mount a scope for this test, I was prompted to also test the UTG 3/8″ dovetail-to-Weaver/Picatinny rail adapter. There was some interest in this adapter; so I’ll continue to test it with other airguns so we get a good look at the performance. Today, I want to do Part 4 on the Crosman 2100B multi-pump that I promised back in March.
I reread Part 3 of this report to see which pellet(s) did well at 10 meters. From what I see, only 7.9-grain Crosman Premiers did well in that test, so I added a couple pellets I had not tried before to today’s test.
The scope I used is an Osprey 2.5-10×42 that has its parallax fixed at 100 yards. It’s a firearm scope, pure and simple. At full magnification, the target was fuzzy, so I set it to about 5.5x for this test. It has a duplex reticle with mil-dots on the vertical reticle, which is about medium thickness. The optics are very clear, and I think the gun got all the help it needed from this scope.
For the 10-meter test, I pumped the rifle 5 times for every shot. Today, I’ll be shooting 25 yards. Now that it has a scope mounted, pumping is more difficult because I cannot hold the gun at the optimum place, which is on top of the receiver. The scope is in the way, and don’t you dare try to pump the rifle while holding onto the scope! Your hand has to hold the gun farther back, which winds up being the pistol grip of the stock. That isn’t the best leverage to pump the rifle, but fortunately the 2100B has a short, easy pump stroke.
For today’s 25-yard test, I pumped the rifle 6 times for every shot. My thought was to shoot the rifle 5 shots with each pellet and see if it was accurate enough with that pellet to warrant the work of shooting the second 5 shots. This would also tell me whether the shots were walking because the bore needed to be seasoned with each new pellet. As it turned out, though, all three pellets were worth the effort to shoot a full 10-shot group, so that’s what you’ll see.
Crosman Premier lites
The first pellet I tried was the 7.9-grain Crosman Premier dome. The first 5 shots seemed to group okay — about what I expected from the earlier results at 10 meters — so I just kept on shooting and finished the 10-shot group. Ten shots landed in a group measuring 0.809 inches between centers. The group is a little wider than it is tall, but you’ll notice that 9 of the 10 shots are actually in a group that is fairly round.
This was better accuracy than I expected, based on the results of the 10-meter test. The group size there was 10 Premiers in a 0.539-inch group; and, at over twice the distance, the group only opened another three-tenths of an inch. I think that demonstrates how much greater accuracy is provided by a good optical sight.
The pace of shooting is slower
One thing about shooting a multi-pump is that everything slows down. It takes a while to make each shot ready, which is similar in concept to shooting a muzzleloading rifle that has to be loaded separately with powder and ball. That slower pace forces the shooter to concentrate more on what he’s doing — or at least that’s how it affects me. That’s why I like single-shot rifles so much — for what they bring out in me.
The second pellet I tried was the RWS Superdome. This 8.3-grain domed pellet is one I don’t try too often — for no particular reason. It’s made from pure lead and has a relatively thin skirt that takes the rifling very well. I really didn’t know what to expect from it, but it’s different enough than a Premier lite that I wanted to see how it might do.
Ten Superdomes made a rather open group that measures exactly the same as the group of Premiers — 0.809 inches between centers. It looks like a larger group, and there’s undoubtedly some error in the measurement of both groups, but I cannot discern any difference between them with the dial calipers.
H&N Baracuda Greens
The last pellet I tried was an afterthought, based on the success of the other day. H&N Baracuda Greens made such a great initial showing that I thought I would include them in this test, just for fun. Boy, am I glad I did!
I was unable to see the pellets that landed inside the black bulls because of the parallax setting of the scope, so it wasn’t until I walked downrange to retrieve the target that I saw what the Baracuda Greens had done. Ten went into a group that measures 0.48 inches between centers! Not only is this the best group of this test, it actually outshot the M4-177 I tested at the end of 2011. That’s Crosman’s other hot, low-cost multi-pump, so don’t get it confused with the MAR177 PCP. That kind of performance says a lot about this air rifle and the accuracy that it offers for very little money.
This will be the last time I look at the 2100B, but it’s been an interesting test. After Part 3, I didn’t think the gun had much more to show us — but this final accuracy test changes everything.
We’ve looked at a fine multi-pump air rifle in addition to the UTG scope ring adapters that let you use Weaver rings on an 11mm airgun dovetail. They proved very easy to install and worked exactly as advertised in this test.
And the Baracuda Green gets another pat on the back. This is a pellet worth considering when you search for the best ammo.
All things considered, I would say this was a fine end to the test of a really great and also inexpensive air rifle!
by B.B. Pelletier
Today, we have a critical report about airgun maintenance and operation. So, if we’re being critical, let’s start with the title. It’s a It’s no one’s fault — let’s all get along title. It should read, Oops! I really screwed up! And when I say “I,” that’s exactly what I mean!
About a month ago, a friend of mine — who shall remain nameless, unless he repeates what I am about to tell you — received a new Benjamin 397 multi-pump pneumatic. Hurray!
I went over all the operational and maintenance steps carefully with him — pump it no more than 10 times per shot, always store it with one pump in it, use Pellgunoil on the pump head etc. — and then turned him loose with his new rifle. Last week the rifle came back to me with the complaint that it didn’t fire pellets anymore.
I must have looked like that old plumber who knows just where to tap the pipe to get the system going again, because before I even examined the rifle I told him it was over-pumped and therefore valve-locked. Then, I took the rifle and opened the pump handle, which sprang open with a lot of force. Yep — it’s valve-locked, all right!
I listened carefully to the story of how it couldn’t possibly have been anything that he did wrong. I’ve heard that same story a hundred times before; but like a compassionate priest, you have to let them confess everything as you listen in silence. On about the third go-round, I got the real story.
It seems he was at work, shooting his new gun with a buddy who was also shooting his own multi-pump. Remember, folks, we’re talking Texas, here. Depending on your job, shooting at work isn’t that uncommon. Perhaps not at a funeral home or at a fast-food franchise, but there are a lot of outdoor jobs where shooting is possible and not objectionable.
They were shooting at a metal sign that the buddy’s gun wasn’t able to dent very much, but the 397 put a big ole’ dent in it. However, something wasn’t right! It seems the other guy’s pump gun was much easier to pump than the 397. What was wrong with the 397?
What was wrong with it was that it wasn’t a Crosman 760, like the other guy’s gun! At least that’s my guess. I’m still waiting to hear what the other guy’s gun was.
So, his new gun was harder to pump, but it was also a lot more powerful. MAYBE he wanted to see if the 397 would go all the way through the sign, thus vexing his friend, which is the tradition whenever two guys shoot together. He pumped it ALL the way up, being VERY CAREFUL not to exceed the 10-pump limit, as I’d instructed him. But that time it fired only weakly.
He handed his rifle to his friend, who then pumped it up again, also being VERY CAREFUL not to exceed the 10-pump limit, because the owner was watching him. This time when the trigger was pulled, the gun just went CLICK and no pellet came out. So, now he knows that his gun doesn’t work anymore.
At least he stopped when it got to this point. He didn’t keep loading pellets and pumping it a couple more times just to be sure. I have seen owners do that before.
He brought me the rifle and asked if I could possibly help him. I told him there are two ways to go about this. One is to wait a couple months and hope that the gun leaks down enough that the valve is no longer locked. If the gun had not been properly oiled with Crosman Pellgunoil, that might have been a possible solution. But it was well-oiled, and I didn’t think it would leak down in even a year!
I decided to go the other way. I would remove the extra air mechanically by partially disassembling the gun and rapping on the valve stem with a heavier hammer. That’s how the repair center fixes guns that are over-pumped. Or, at least it used to be! This is where the “old plumber” became a student, again.
I discovered that the new 397′s design is vastly different from what I was used to. You can no longer do what I just said because the gun is not designed to allow it. The new design is much cheaper to build and easier to repair — except when the gun is over-pumped. I’ll describe what I did and what happened as a result — and I don’t see any other way of doing the job.
Poor photos today
I apologize for the poor photos that follow. I was working on the gun and getting dirty, so I used the flash on the camera to make the work go faster. That’s why everything is so over-exposed.
What appears to be the stock screw also holds the valve inside the pressure tube. If the rifle is pressurized, this screw will be under pressure from the valve body trying to move! If this is the case, remove the bolt before you loosen this screw!
The new 397 valve is held in the gun by the single stock screw. That screw fastens the trigger group to the action, and there’s no way to rap out the air the way I described it earlier. I did an internet search and discovered there were no instructions on what to do! In fact, everyone dances around this design almost as though they don’t understand it, though I’m quite sure most of them do. It’s so much simpler than the guns I’m used to. When a gun is over-pumped, there seems to be no good way of depressurizing it — other than to remove the single screw I just described and let the air blow out. But before you do, be sure to remove the bolt first!
I didn’t know it while I was doing it, of course, but when the stock screw backed out sufficiently far, the air exploded out of the gun as the valve moved within the pressure tube. It caught me by surprise, but in retrospect I can’t see a better way of doing the job. If anyone knows of one, I’d like to hear what it is.
In retrospect, I should have removed the bolt from the gun before removing the stock bolt. To do that, remove the two screws that hold the sideplate to the left side of the action, exposing the Allen screw on the bolt that cocks the hammer. Then remove the Allen screw, and the bolt slides out of the action.
At this point, I finished the disassembly, checked all the parts to see that they were okay, which they were, and assembled the gun again. There’s a trick to assembling this gun. The pump arm must be swung forward to allow the valve to go forward enough for access to the screw hole. If you do that, this is an easy pneumatic to assemble. If you don’t — good luck!
And how does it work?
The rifle now works fine, but I’ll run a little test to see how fine. I’ll shoot the gun through a chronograph on six pumps, and keep increasing the number of pumps until there air remains in the gun after the shot. Then, I can tell the owner what the exact maximum safe number of pumps are for this specific gun. That’s another great reason for owning a chronograph!
Checking the velocity
I decided to use Crosman Premiers in the 7.9-grain weight for my test pellets. This is what the gun now does.
8………….688………..Yes! A soft pop was heard.
9………….713………..Yes — a second shot went 555 f.p.s.
Chronograph reveals what happened
It’s easy to see what happened to this rifle. I told the guy that 10 pumps was the maximum, because I thought that was what the owner’s manual said. But it isn’t! Crosman has folded the Benjamin rifles and Sheridan rifles together, and now they all top out at 8 pumps. So, I was responsible for the owner over-pumping his gun! Several years ago, when the Benjamin and Sheridan brands were different, the Sheridan stopped at 8 pumps but the Benjamins stopped at 10. But those days are over. Now they all stop at 8. So — shame on me! Apparently this is my week for confessing my sins.
What if you don’t own a chronograph?
But you don’t care about that! You care about your own air rifle, and, since you don’t own a chronograph yet, how can you determine the exact number of pumps that are maximum for your rifle? It’s simple. Do what I did above and increase each shot by one pump. Then cock the rifle afterward and fire it again without a pellet. Listen for the pop of escaping air. When you hear it, back off one pump and that is the maximum number of pumps your rifle can handle.
Just to be safe, pump your rifle to the newly established maximum number of shots five times and shoot it. After the fifth shot, cock the gun once more without pumping it and fire it again, listening for a pop. Sometimes the amount of air that remains is so low you cannot hear it, but after a cumulative five shots, you should be able to hear it very well.
I got the tables turned on me this time. And I also learned how easy it is to work on these new Benjamin rifles. And you readers got to watch everything over my shoulder, plus you got a new way of testing the maximum number of pumps for your specific pump rifles if you don’t own a chronograph. I would call that a good day’s work!
by B.B. Pelletier
Blog reader J was alert and noticed that I had not yet done the accuracy test of the Crosman 2100B multi-pump. I was astonished to find that he was right, so today we’re going to look at it. But before we do, I want to show you something I did at the range last week. Some of you who have been reading for a long time will remember that over a year ago I was suffering from eye problems. It turns out that my diabetes had dehydrated me so much that my eyesight was affected. And it took a long time for the situation to correct itself. I wondered if I would ever be able to shoot with open sights again.
This past Thursday, I was out at the range testing several firearms and airguns and a friend of mine happened to bring his Remington RangeMaster model 37 .22 rimfire target rifle for me to try. The model 37 was Remington’s equivalent to Winchester’s model 52 target rifle until the model 40X was created, and it (the model 37) has the reputation of being incredibly accurate. My friend can no longer use open sights and is scoping all the rifles he intends to keep. But this one is a rifle he has owned for decades but never shot. It still has the factory non-optical target sights.
The Lyman 17A front globe has a post-and-bead like target shooters used back in the 1930s and earlier. You put the post at the 6 o’clock spot on the bull. With good eyes, this kind of sight is considered second only to a properly sized aperture front sight out to 200 yards, and world records have been set with it. But notice I said, “With good eyes.”
I shot it at 50 yards with Winchester Super-X high-speed ammo, which is hardly target ammo! When I saw the group made with five shots I was ecstatic, because it proves that I can still see good enough to use open sights. I stopped at only five shots because who wants to ruin a group like that? However, after an involved trade with my friend, I ensured many more years of shooting this 37, and eventually I will shoot 10-shot groups. That’s important for today’s report, because the Crosman 2100B has a square post-and-notch sight, and the front has a bright green fiberoptic bead.
Next, I tried my custom .17 HM2 that this same friend made for me on a Mossberg 44 US action. This rifle has a Leapers scope, so there’s an even better chance of hitting the target. This time, five shots went into 0.266 inches at the same 50 yards. I was on fire! Unfortunately, I haven’t yet mounted the scope on the FWB 300S, so I didn’t have that to test, but everything I shot that day went where I wanted. Since I couldn’t see the group through my scope, I knew it was a small one. And, once again, I chickened out after 5 shots. If I were reporting on the guns and shooting for the record, I would have shot 10 shots with each gun.
Five shots in 0.266 inches at 50 yards with a scope. Not that much better than open sights. It looks better because the .17-caliber bullet is smaller, but the actual size of the group isn’t that much less than the first group.
On to today’s test
I decided to begin shooting pellets with the 2100 at 10 meters. That way, if the rifle proved somewhat inaccurate, I could still keep them inside the trap. The 2100 has a .177 rifled barrel, so pellets should be more accurate than the steel BBs it also shoots. Since this is a Crosman rifle, what better to begin than with 7.9-grain Crosman Premier 7.9-grain domes?
The first thing I did was oil the pump head with several drops of Crosman Pellgunoil. I did that for the velocity test, as well; but since it’s impossible to overdo this step and it does ensure the best compression, I did it again.
I decided on 5 pumps for this test because the velocity test showed that was enough to get all pellets into the 500 f.p.s. range. At 10 meters, that’s all you need for good results. So, this test was very easy on me.
A new way of loading
Many owners may already have discovered what I am about to share; but while I was shooting the Premiers, I discovered a foolproof way of loading them. The loading port on the side of the rifle is too small for most adult fingers, and until now I’ve found it difficult to load the pellet so the head points forward. But during this test, I accidentally discovered that I could drop in a pellet in any attitude and simply elevate the muzzle of the rifle with the receiver rotated to the left so the loading port is angled up. The pellet would then try to right itself at the bottom of the loading channel; and, if it wasn’t aligned, all I had to do was push it forward slightly with the cocking handle and then pull the handle back and the pellet would align itself every time. I tried this with the JSB Exact RS pellets, as well, but they got stuck and didn’t align as easily as the Premier lites. I can’t wait to try this method on my old Crosman 2200.
Sights are okay, but not great
I found the sights easy to acquire and very sharp and crisp, but the method of adjustment leaves a lot to chance. I never did get the group shooting where I wanted it. Also, though I elevated the rear sight nearly all the way, it was still just hitting at the point of aim at 10 meters. Forget about shooting longer distances unless you learn how to hold the front post above the top of the rear notch. But the sights are not important, because this will not be the last test of this rifle. Just like the M4-177 rifle I tested last year, I found the 2100B was far more accurate than the price indicated! In a word, it was phenomenal — which is why I told you about the state of my eyes in the beginning of the report.
Next, I tried the JSB Exact RS pellet. I was expecting to see a similar group, which is why what I got surprised me so much.
What a difference! Crosman could use this as an ad testimonial for Premiers, if they wanted. We all know that the JSB Exact RS is a premium pellet; but in this rifle, the Premier lite is the clear and obvious choice. I already demonstrated that my eyes are up to the task, so there’s nothing to blame in this case but the pellet.
After testing two pellet brands, I switched to Crosman Copperhead BBs and fired 10 from a standing supported position at 22 feet. If the group was small, I would then try other brands of BBs, but as you will see that wasn’t necessary.
Ten Crosman Copperhead BBs went into this 2.219-inch group at 22 feet. This demonstrated that it wasn’t worth pursuing BBs any further. My photo inadvertently cropped off a BB hole on the right of the group. It’s on the 5-ring, as it ends on the right margin.
This rifle is deadly accurate with Crosman Premiers and not very good with BBs. I wouldn’t even bother with BBs in the 2100 anymore because I have a host of BB pistols that will out-shoot it. But with Premier lives, it’s a different story.
The 2100B has earned the right to a special 25-yard test with a scope sight. That will come in Part 4, and I charge blog reader J with making sure I don’t forget to do it!
by B.B. Pelletier
Today, we’ll look at the velocity of the Crosman 2100B multi-pump, and a strange thing occurred during the test. Actually it was two strange things — one an amazing coincidence and the other just weird. Both relate to oiling the gun, and both will be informative.
First, the coincidence. As I was writing this blog (last week, because I’m in Las Vegas at the SHOT Show this week), I got a question from a reader whose 2100 wasn’t pumping air. I asked him if he had oiled the pump piston head like he was supposed to, and I directed him to the online owner’s manual that tells how to do it and to a blog I wrote years ago that tells the same thing. A couple hours later, I get a thank you message that he’s oiled the gun and it seems to be holding air.
So, there I am in my office pumping the gun and shooting it for velocity and I ask myself about the state of the pump piston head of the particular gun I’m testing. Sure, it’s brand-new, but that doesn’t mean that it has enough oil. I look, and the pump head appears to be dry. For those who wonder what I’m talking about, please read the manual.
Then, I recalled that someone had guessed that this rifle would shoot in the low 600s with lead pellets, because someone he knew had tested it. Lo and behold, it was shooting only about 622 f.p.s. on 10 pumps (which is the maximum) with Crosman Premier 7.9-grain pellets. Wow! He was right!
But, wait! The pump head was dry, so I oiled it with some Gamo oil for CO2 guns. The velocity jumped to 658 f.p.s. with the same pellets and 10 pumps. But after about 10 shots the velocity started declining again.
So, I oiled the pump head again — this time with Crosman Pellgunoil. The velocity jumped to 690 f.p.s. before sliding backward to the 620s.
What did I learn?
First, I re-learned for the umpteenth time how important it is to oil a multi-pump gun. That was all it took to fix the reader’s rifle! Second, I saw that the test 2100 rifle responds to oiling immediately, but falls off again almost as fast.
So, the published velocity of 725 f.p.s. can probably be achieved with real-world lead pellets for a brief time, but this test gun won’t hold that velocity very long. Maybe the material the pump head is made of needs a break-in period? I don’t know. What I do know is that I can change the velocity of this gun by 70 f.p.s. simply by oiling it.
It doesn’t end there, however. While that story was unfolding I was also experimenting with the speed of my pump strokes. Since the pump head seemed somewhat hard, I figured that faster pump strokes would build more pressure. And they did! I could increase the velocity by 10 f.p.s. at least, just by changing the speed at which I pumped. I’ve tried the same thing in the past with other multi-pumps, but this one is particularly sensitive.
I think the most representative method of testing this rifle for velocity is to let it sink back to its lowest velocity and stabilize there. That way, the velocity test will also represent the velocity at which the accuracy test is conducted, because I’m certainly not going to oil the pump head after each and every group! Undoubtedly, there’s sufficient oil in the gun right now because of the two oilings I mentioned.
The first pellet tested was the 7.9-grain Crosman Premier. Since the 2100 is a multi-pump, I decided to test each pellet and BB at 5 pumps and 10. That gives us a good picture of what the gun can do across the entire range.
On 5 pumps, Premier lites averaged 540 f.p.s. when the gun was pumped fast. They ranged from 537 to 543; and at that velocity, they produced 5.12 foot-pounds On 10 pumps, again with rapid pump strokes, this pellet averaged 630 f.p.s. The range went from 628 to 635 f.p.s., and the average muzzle velocity was 6.96 foot-pounds.
JSB Exact 8.4-grain dome
Next I tried the 8.4-grain JSB Exact dome. On 5 fast pumps they averaged 526 f.p.s., with a spread from 517 to 531 f.p.s. The muzzle energy averaged 5.16 foot-pounds. On 10 pumps, they averaged 608 f.p.s. with a spread from 595 to 611 f.p.s. The average muzzle energy was 6.9 foot-pounds.
JSB Exact RS
For a light pellet, I tested the JSB Exact RS. The name of this pellet includes the word Match, but they’re domes, not wadcutters, and cannot be used in formal match shooting. At 7.33 grains, they’re very light, yet I’ve had some good luck with them in other pellet rifles.
In the 2100, 5 pumps gave an average 559 f.p.s. The spread went from 555 to 563 f.p.s. The average energy was 5.09 foot-pounds. On 10 pumps, the average velocity was 646 f.p.s., and the range went from 635 to 654 f.p.s. At the average velocity, the muzzle energy was 6.79 foot-pounds.
So, the reader who said the 2100 wouldn’t get to 700 f.p.s. was right. As long as you don’t shoot it immediately after oiling with Pellgnoil, it won’t shoot that fast. But oil it, and it’ll probably top 700 f.p.s. with lighter pellets.
On to BBs
BBs were next, and with them things are much more standard. Though there are subtle differences in BB brands, they don’t vary as much as pellets. We’ll now see if the advertised velocity of 755 f.p.s is reasonable. Since this is a Crosman gun, I tested it with Crosman Copperhead BBs.
BBs are loaded into the large reservoir, then the gun is shaken and they fall into the smaller spring-loaded magazine. Once the magazine is empty, you can shoot pellets again, even though there BBs are still in the big reservoir; if they aren’t in the magazine, they won’t load automatically.
On 5 pumps, Copperheads averaged 570 f.p.s. They ranged from 564 to 578 f.p.s. At the average velocity, they generated 3.68 foot-pounds of energy at the muzzle. On 10 pumps, they averaged 678 f.p.s. and ranged from 672 to 682 f.p.s. That’s an average muzzle energy of 5.21 foot-pounds.
So the bottom line is that the test gun doesn’t meet its advertised spec for velocity. It falls at least 73 f.p.s. short. It does the same with lead pellets, so I’m withdrawing my remark that the gun is suitable for light hunting. Clearly, it’s below the safe margin. Yes, it will kill small animals, but I could not recommend it for that task based on these results.
I also note that the barrel is starting to loosen at the breech. It rotates slightly at this point, and I’ll keep an eye on it. And the pump lever hits the gun with a loud slap on every pump stroke — there’s no cushioning material to deaden the sound.
I hope these results don’t disturb owners of this gun, because they in no way condemn it. The accuracy test is still to come, and we might get a big surprise there.