Suppressed Beretta 21A

[wmdaniel70]

Hello all. I have a Beretta 21A threaded. I have put both a Specter 2 and a Sparrow on it. Without a suppressor it shoots fairly well (for a micro-gun!) but wen suppressed, the group drops about 4" at 20'. That seems like an awful lot. None of my other 22 hosts have any change to speak of. I am using CCI Standard velocity in all. Is this common in a little gun or might something else be causing a problem? I realize it is what it is, but wondered what others think. Thanks again.

[MrM2hb]

I have one with a sparrow on it and never thought about grouping it. Will have to try it.

[paperhunter]

I had a beretta 21 with a crimson trace laser. I was getting a fairly significant poi shift before I sold it. Couple of inches at 10 yds. Windage and elevation both. Nature of the beast would be my guess. I could dig out old targets. Pm if you are interested.

[wmdaniel70]

Just curious, how does a suppressor cause a drop in POI? Due to blowback? Something is causing a decrease in velocity, and apparently the shorter the barrel the more significant the drop??

[Bendersquint]

Just curious, how does a suppressor cause a drop in POI? Due to blowback? Something is causing a decrease in velocity, and apparently the shorter the barrel the more significant the drop??

Have you chron'd it?

[rancilio]

Any updates?

[Garrett]

Just curious, how does a suppressor cause a drop in POI? Due to blowback? Something is causing a decrease in velocity, and apparently the shorter the barrel the more significant the drop??

Not necessarily the velocity. It can drastically change the barrel harmonics. On some guns it acts like a big muzzle brake as well. Or the weight changes the way the gun recoils.

I had a Contender .44 barrel threaded for a MAC can at one time. Unsuppressed and shooting from sandbags, the gun would recoil upward quite a bit. Add a 12" can to the end of the barrel, and it would recoil straight back - no muzzle flip at all. Think that made a difference on downrange POI? It only moved it down several feet at 100 yards.

As for the 21A, I really haven't shot mine much without the can attached. And suppressed, the can obscures the sights. I shoot with both eyes open and sight "through" the can. I find it fairly difficult to do with the 21A and its tiny sights. So it's really a short-range proposition. I keep thinking I need to get a Crimson Trace laser grip. I just haven't gotten there yet.

[wmdaniel70]

I have not chrono'd it; don't have the equipment. It does have Crimson Trace grips (Really helpful!!) that were aligned without a suppressor. With laser, nice group. Add can, still decent group but about 4" lower at about 20'.

[Joker31D]

I'm really wanting to do this myself ...ordered a tiny B22 can from HTA, thing is 3.75 x 1in tried it on a p22 and was pretty quiet, cant wait to get it out of jail, shot it at the dealer into a snail trap.

[chili17]

I have not chrono'd it; don't have the equipment. It does have Crimson Trace grips (Really helpful!!) that were aligned without a suppressor. With laser, nice group. Add can, still decent group but about 4" lower at about 20'.

Best guess, the suppressors weight on the end of the barrel is tiltling it down causing your low POI

[ASP2001]

I have a 21A that was threaded by Accurate Ordnance that I run with a sparrow. With crimson trace laser, it will shoot dimes groups at 7 yards. While I've nailed opossum at 20 yards with it, I consider it a 7-10 yard setup. Anything outside of that, a Tacsol PAC-lite is a better setup.

Speaking to the POI shift, again, at 7-10 yards I haven't noticed any POI shift with or without the sparrow. I shot a few groups tonight with Gemtech's 42 gr subsonic was was pleased with the ammo.