Suppressing a 357magnum automatic

D

Deja vu

New member
I currently own many 357 magnum firearms both in pistols and rifles. Among them is a Coonan Classic 357 magnum semiautomatic.

I am wondering if a standard 9mm can will be able to handle the pressure of a full power 357 magnum round or if not what you would recommend.

I realize that I will have to get a longer barrel for the Coonan (one that sticks out from the end of the slide).

I know many people suppress 357 magnum rifles with a 9mm can but would the can be able to handle the added pressure from a 6 inch barrel?

I realise that a can works best with subsonic ammo and I plan to reload some subsonic bullets but I would like to shoot it with full loads as well... is that possable with out dammaging a 9mm can?
 
Your 357 magnum auto loaders are not going to cycle with subsonic ammo.

Just buy a 9mm pistol
Click to expand...

I all ready have run it with subsonic 180 grain bullets. It runs fine.

It also run 38 specials (with a lighter spring) and most of those are subsonic
 
If that doesn't work go find you a class 3 gun shop with manufacturing license and get the to custom build you one and register it with the atf..:)
 
i've been looking at this too. i looked into getting a threaded barrel, storm lake said they will only make barrels for Coonan, and not individuals, so i think we are on our own as far as building an adapter to mate a suppressor to our barrel. and from the research ive done, it appears as if we would need a similar diameter rifle supressor, or a 9mm SMG suppressor to handle the load, and a nielson device to make it cycle. im thinking of making my own, probably a wet one, so i can keep it sorta kinda compact, as much as i can be. hope that helps answer any questions?
 
Last edited:
I know they are thinking about making longer barrels for the Coonan. I read this on there forums. If they do a 6 inch barrel it would be as easy as just having a gun smith thread it.

I have talked to several places that make suppresses. Most of them say a 9mm pistol suppressor will not work well with a 357 magnum (semiautomatic) pistol but would probably be fine with a 357 magnum rifle.
 
Your 357 magnum auto loaders are not going to cycle with subsonic ammo.
Click to expand...
Who cares about subsonic? The sonic crack is just a fraction of the muzzle report anyway. With a can it will be much quieter.
 
what do they know? how many people have tried it!? lol. i think I'LL be the judge of how well it works! im sure a wet can will work wonders. at a minimum, it'll eliminate the flame the blows out of the barrel, and cut down on the boom. the zombies wont know what hit em...
 
Who cares about subsonic? The sonic crack is just a fraction of the muzzle report anyway. With a can it will be much quieter.
Click to expand...

even if the Coonan stock spring did not function with sub sonic ammo (mine does with 180 grain rounds) how hard would it be to put a lighter spring in? It uses the standard 1911 sized springs the stock spring for 357 magnum is 22lbs you could just go lighter if needed for sub sonics.
 
You must log in or register to reply here.
Back
Top