Suppressed 1911 blow back?

[zerobarrier]

Hello all,

Hopefully someone can answer this for me. I search but couldn't find the answer. I have a Kimber CDP custom that I put a storm lake threaded barrel on and attached a Osprey 45 to it.

When I fire it with the suppressor I get alot of powder blast in my face. Is this normal? Its so much that it makes it unpleasant to shoot. If this is normal i may just resell the barrel I bought since it was like $250ish. I have never shot a suppressed 1911 before. I am using titegroup under a 230gr pill.

 

[zerobarrier]

So nobody has any experience shooting a suppressed 1911 that can tell me if the powder blowback is normal?

 

[Telekinesis]

I've never shot a 1911 suppressed, but I can tell you that blowback is going to be present in almost every suppressed firearm because of the increased back pressure caused by the can. I've shot guns that have just a slight puff of powder at the breech to suppressors that throw ablative back at you, to getting so much powder residue coming out that my hands and forearms are literally covered in black gunk.

Certain guns may unlock sooner than others, and I've found that has a big impact on how much powder comes out of the breech (blowback .380 with a wet/wiped micro can which opens REALLY early has more residue than a P226 with full sized can which typically opens later than other designs like a Glock).

Basically, there's not much you can do if you don't like how the gun shoots with the can. You might be able to use a stiffer recoil spring and/or main spring, but that's the only thing I can think of.

Otherwise you could try machining a grove in your chamber which A) may or may not work, and B) if it did work, it would relegate that gun to suppressed use only. Note that I've never seen that kind of mod done to any kind of delayed operating system. It typically only happens to blowbacks like .380s, and then only if the owner is really adventurous (I'm still deciding if I want to do it to my Makarov).

 

[ldsgeek]

Another thing to try is a square bottomed firing pin retainer. That generally slows the unlock and softens the felt recoil.

 

[zerobarrier]

Right now I use the can on a glock 23 and a berretta 92fs and get no blow back what so ever. I'll take it to the range again and if it is too much I will just go back to the factory barrel and eventually get a hk usp or fn tactical to use as a 45 suppressed host.

 

[OARNGESI]

Its not a issue on my tirant remington r1 combo ocasionally if its wet maybe but no issues dry.

 

[Nuclear]

I shoot a 45 Osprey on a Sig 1911 and the blow back isn't bad at all. More than unsuppressed, but not bad. I haven't shot any hand loads yet, just factory 230 grain ball. Try some factory loads.

 

[Bartholomew Roberts]

Are you shooting indoors or outdoors? That can make a noticeable difference in how pleasant it is to shoot some suppressed firearms.

At the same time, the whole concept behind suppression of the muzzle crack is that you are delaying the exit of the gases until they have time to slow/cool so that you do not get that supersonic crack as they exit the muzzle. In practice, this means increased backpressure that flows out the chamber end of the weapon as well and it will be present in any suppressed firearm to some degree.

 

[HRnightmare]

I Second Bartholomews post. When I first bought my 9mm suppressor I shot it indoors and honestly went home with buyers remorse that I spent all that money on something I don't enjoy.. I shot it outdoors to show my friends and it wasn't nearly as bad. Probably the breeze redirecting it. After a few hundred rds my perspective did a 180.

It started off breaking loss from the barrel and being to be tightened every 10rds or so and no longer does, it had several failure to feed problems and it no longer does, and the blowback seems to be only noticeable with subsonic ammo.

I don't know the science to it but agree probably 250-300 rds "break in" it became much more enjoyable...

Maybe just bear through it and see if it gets better.

 

[bikemutt]

I took my newly acquired Octane 45 to the range today, mounted on a Glock 21 (45 ACP). There was very definitely blow back, I would not shoot this without eye protection, then again I never shoot without eye protection. I'd say it was more being peppered with stuff than being gassed out, like when I shoot a semi-auto rifle suppressed.

The fun factor and quietness overwhelmed the blow back.

 

[zerobarrier]

I am shooting outdoors. I do not get any blow back when I use the suppressor on my glock 23 or beretta 92fs, so I thought it might be the 1911 design. When I use my 22 suppressor on my sig 1911-22 I get some small blow back but none on my ruger 22/45.

 

[Bartholomew Roberts]

The 1911 may just be opening earlier, which means there is more pressure in the system and it flows towards the easiest exit. You could try using a stouter recoil spring in the 1911 to delay unlocking a bit and see if that makes it more tolerable for you.

 

[zerobarrier]

Ok so I went to the range with it again today. I get really bad blow back with 185gr handloads, like my face was covered with black specs. I barely got any blow back when I shot 230gr factory federal ammo. Could it be the titegroup powder?

 

[Ironman]

Its the powder. You need a faster burning powder. All suppressors exhibit increased back pressure and blowback to the face. The key if your a reloader is to try different powders.

 

[bikemutt]

My Octane 45 was used Thursday on an H&K VP9; blow back? yes, but much less than the Glock 21 45 auto. Maybe it's just the nature of the beast.

 

[TIMC]

Running Universal in my hand loads with 185 and 230 grain bullets. I'm running an Osprey on a Kimber Warrior and get little to no blow back.