Further desecration of the Mosin

[PTK]

Yes, it is I, the destroyer of Mosin Nagant rifles. This time I'm having a 91/30 threaded as-is for a silencer. I'll be running only handloads through this, obviously, as I don't want to have anything corrosive in there. It should turn into a pretty neat toy at the range.

So, who hates me now?

 

[Dgreno]

I hate you. Post pics ASAP

 

[Avenger29]

I hate you more. Youtube it so I can focus my hate.

Odd, I had the same kind of thoughts the other day (what if you suppress a Mosin? What if you suppress an AK?)

Why don't you suppress your SBR Mosin, though? That would be frickin' awesome.

 

[PTK]

Why don't you suppress your SBR Mosin, though? That would be frickin' awesome.

The pressure would be far, far too high. It would literally blow the silencer to pieces.

I hate you. Post pics ASAP

Well, I'm sending the 91/30 off tomorrow to have it threaded, and hopefully the silencer will be at the dealer next Wednesday to send the form 4 off, and then perhaps a month or three after that I'll be able to post pictures.

 

[35 Whelen]

Aren't silencers relatively ineffective when the bullets velocity exceeds the speed of sound?
Just wondering...
Your Fellow Mosin Desecrator,
35W

 

[Moonclip]

IIRC the Soviets did issue some silenced ones with the appropriate subsonic ammo for them.

 

[esmith]

Aren't silencers relatively ineffective when the bullets velocity exceeds the speed of sound?
Just wondering...

The point of suppressors isn't so that the guy you are killing can't hear you. It's so all the bad guys around him won't.

 

[Bartkowski]

With ammo that is faster than the speed of sound, you will hear a loud crack if the bullet passes near you.

Suppressors can get rid of muzzle flash too.

 

[kingjoey]

Did you get a suppressor that works with .311" bullets?

 

[General Geoff]

I'd imagine any 7.62 NATO-rated suppressor should work pretty well with 7.62x54R. The suppressor's baffle clearances are not to within 0.002 inches, otherwise the bullets would occasionally clip the edges just from barrel harmonics changing the relative position of the suppressor in relation to the projectile traveling through it.

 

[Coronach]

Aren't silencers relatively ineffective when the bullets velocity exceeds the speed of sound?

I wondered about that a while back. The answer is yes and no.

You will still get the supersonic crack from the bullet, but it is hard to localize where that came from, and it still significantly reduces the report of the actual gunshot and the muzzle flash. So, while it does not completely silence the shot, it does help tactically, and allows the user to use the gun indoors without rattling fillings too much or outdoors without earpro*.

Of course, even if you have a subsonic bullet, a suppressor does not completely silence the gunshot. But using subsonic ammo will eliminate the sonic crack.

Mike

* still not a great idea for centerfire, though, long term. They're still pretty noisy.

 

[JesseL]

Did you get a suppressor that works with .311" bullets?

I could be wrong (I often am) but I don't think they make the 30 cal baffles so tight that an extra .003" would cause problems.

 

[Omnivore]

Aren't silencers relatively ineffective when the bullets velocity exceeds the speed of sound? Just wondering...

The point of suppressors isn't so that the guy you are killing can't hear you. It's so all the bad guys around him won't.

Suppressors never "silence", so in that sense they're all ineffective at achieving hollywood results. They do however reduce the muzzle blast by several orders of magnitude, so you don't blow your eardrums, or annoy your neighbors when shooting in the countryside. In some countries, they are required, same as a muffler on your car.

Fire a .22 long rifle at 50 yards of better, and you will hear a "swoosh" or "hiss" as the bullet flies. You hear it with a .22 LR because not only is it supersonic, the muzzle blast is so light it doesn't mask the bullet wake sounds for you. That's the sonic "crack"- a three dimensional, cone-shaped version of a wake behind a boat in the water, and as that wake falls against nearby surfaces and reflects, it gives you that "whoosh". (You can actually see that wake with high-powered rifles and high-powered optics if you sit behind the shooter)

If the bullet flies past you, you hear that sharp "crack" as that small portion of the wake hits you straight-on, then you hear the hiss (don't try it-- use a recorder of you're that curious). Multiply that several times over, and that's what you get from a high-power rifle. If that high-power rifle is suppressed, you get the crack with a light "thump" instead of a big "boom". Much more tolerable-- and polite for people living nearby.

 

[kingjoey]

I could be wrong (I often am) but I don't think they make the 30 cal baffles so tight that an extra .003" would cause problems.

Most don't have a problem with it, but depending on the baffle design or type of wiper I've heard that some can.

 

[PTK]

kingjoey

Most silencers are made with more than .075 room around the bullet. The difference between a .308 and a .312 bullet is less than a sheet of paper in thickness. It'll be fine.

 

[General Geoff]

Suppressors never "silence", so in that sense they're all ineffective at achieving hollywood results.

Tell that to William De Lisle.

 

[Mr White]

You will burn in milsurp hell for all of eternity. Anxious to see pictures.

 

[azhunter12]

I'd like to see this too.

 

[RockyMtnTactical]

I hate you because you never posted pics...

 

[PTK]

Pictures will be posted ASAP. For what it's worth, the silencer is going to be the 762SD by AAC, the same one for my 308, 30-06 and 300 Whisper.

 

[esmith]

Suppressors never "silence", so in that sense they're all ineffective at achieving hollywood results. They do however reduce the muzzle blast by several orders of magnitude, so you don't blow your eardrums, or annoy your neighbors when shooting in the countryside. In some countries, they are required, same as a muffler on your car.

I know, that is why i called it a suppressor. When i said the bad guys around the enemy you just killed won't hear the report i meant they wouldn't hear it at a long distance. If they did hear it it probably wouldn't be distinguishable as a gun shot.

 

[Chipperman]

The pressure would be far, far too high. It would literally blow the silencer to pieces.

I bet you could download it enough to be safe and quiet.

 

[Coronach]

If not, video of the suppressor being detonated would make you a god on YouTube.

Mike

 

[PTK]

I bet you could download it enough to be safe and quiet.

Still not practical. For the accurate ranges I could get with the SBR 91/30, I have silenced pistols.

Anyway, to those who are saying "why bother, it's a rifle!", a silencer removes muzzle blast. The bullet still makes noise, but not the rifle. Better yet, the bullet makes noise that deceives anyone who hears it - if it passes you to the left, you think someone shot at you from the left, etc. It is the moving source of noise. Quite neat, really.

Coronach

Oh, of course. It's only $1000, right?

 

[Harry Paget Flashman]

Only the unenlightened and ignorant could hate you, PTK. Mosin Nagant's cry out for the loving touch of a hack saw and JB Weld. Some of my best work is displayed here http://www.thehighroad.org/showthread.php?t=286637&page=2 in post numbers 26 and 39.

My only criticism would be the churlishness of not posting pictures although churlishness is a hallmark trait of the True Bubba. I just don't get the threading part...what's wrong with glue or a hose clamp?