Crosman/Benjamin Nitro Piston 2 rifles

[NoSteppy]

So I have had a Benjamin Rouge SBD in .22 or a while now. I've started to notice that the groupings I'm getting are worse than the the groupings I would get with my older Benjamin Prowler. Is Crosman's manufacturing standards slipping? Are rifles with bigger suppressors just naturally less accurate than ones with smaller ones? Did I just get unlucky?

 

[gadballs9]

Couple things to check: are ALL the screws tight and Loc-Tite'd? Also, is there any chance pellets are clipping the suppressor? Might check breech seal as well.

 

[Stefanjan]

When was the last time you cleaned it? Perhaps a different pellet? I knowthey hadsome barrel issues a while back but thought thatwas prettymuch squared away.

 

[PumaCarl]

I just happen to be be working on one right now and I have noticed that the stock is not bedding the action properly. A rifle should drop into a stock solidly and tightening the screws should not move things around, they should just get tight. On the Benjamin that I am working on the rear screw pulls up the front and the forward screws then have to pull down hard into the stock. If I put in the front screws first it picks up the rear enough that it gets me nervous to tighten it. Doing them all together certyainly isn't the answer either, it pulls everything evenly but the sresses are wrong; they shouldn't be there. On a powder burner I would bed the stock, on this one I am just going to put washers under the rear screw until I don't notice any uneven pulling front to back. I hope this accounts for the horrible accuracy this gun has. I thought it was because of the horrible trigger but I fixed that and got a, bang-on-the-floor safe, two-stage 20 ounce trigger and it still shotguns. Back to the drawing board, I figured I would check all the screws and I started to pay very close attention to stock fit. I hadn't noticed this problem originally because I usually do try to tighten every screw evenly. I am out of the washers that I need to try this right now, but I will post my results tomorrow.

 

[Skillet]

I would suspect the barrel. Brought alot of rough bores up to scratch by polishing/lapping. I’ll also polish crowns with a sharpened pencil/cordless drill/lapping compound.

The state of some of these new barrels is truly shameful. Lazy machinists letting tools get dull..

 

[PumaCarl]

I tried shimming the rear stock screw, which stressed the tube a lot less, but it had no effect on accuracy. The barrel was cleaned with JB, all screws, everywhere, checked. No clipping pellets. Tried different holds. This is the most "off" air rifle that I have ever seen. I have no obvious idea why. Win some, lose some, I guess. Good luck trying to get yours to shoot better, and if you have any luck, please post.

 

[ahnlaashock]

Put a sling on it. Hold the sling with your hand wrapped around it and rthe gun sitting on top of your thumb with your fist closed. Do not put your thumb in the thumbhole any further than needed to pull straight between the trigger and the back of the pistol grip, or leave it straight up the side of the stock. Mine likes wadcutters and the Ruger Superpoints from Umarex.

When I am hunting, I loop the sling over my elbow, and open the hand around the sling so I can put my finger tips against the side of a tree. Shoots pretty much the same as it does if I am at the bench with my arm on the bag. Don't grab the gun with either hand. The sling still provides good control.

Before you try, get rid of the sharp flashing lines around the cocking slot in the stock. If you don't, you will end up with a whole bunch of little cuts on top of your hand.

 

[bigheadted]

My .22 NP rifles took literally a few hundred shots to get decently accurate after cleaning them

Now I do not clean unless they pattern instead of group. 

 

[PumaCarl]

I just recently decided to give the Benjamin some more attention and I am finally getting sub-dime sized groups at 20 yards. This gun started out doing 3" groups so I am very happy with the results. Unfortunatly I did not accuracy check between each improvement, so I have no idea which one thing made the most difference. I had already done the trigger, which was really the amazingly easy part. I have bought CDT triggers before, never again. They are good but no better than my results for next to nothing in cost. The first thing I did was to drill out the end of the BSD in case it was clipping and I ran a tapered rat tail file down the baffles to open them up. Cleaning off the plastic baffles with an exacto knife took a while.Then I replaced the plastic washers on both sides of the barrel pivot with brass ones that I turned down myself. I should have done this first actually, the plastic washers are a bad joke. Lastly, I tackled the stock, which was the worst fitting stock I have ever seen on anything. I had to dremel out a lot more than I was originally comfortable doing but it had to be done. Understand, this is not my gun, it is my brother-in-laws and I was just doing this to see if it could be done at all. It finally seated correctly and I cleaned everything up, including the barrel again. It was raining outside but I had 20 yards inside of a barn and the gun finally shoots! In fact, I had a rickety rest and was resting on a bucket and I could still cover the groups with a dime. Done.