suppressor Question

[target17]

I have a .223cal silcenser for my AR-15 & it works very well. I bought the adapter for a Walther P22 & it works very well on it, standard velocity or High Velocity, the silcenser weights twice what the gun weights & looks extremly silly, but, just playing around! Now, when I put it on a .22 LR. rifle, 16" barrel, it works great with .22LR standard velocity, but does nothing in reducing the sound with .22LR high velocity. Both are solid nose CCI, can't say for sure about the bullet grains. This is not what I call a problem, but it is bugging the heck out me as to why! If some body knows the reason for this, it wood be greatly apprecitated. Thanks Tom

[RenegadeGlocker]

The sound of the sonic crack overwhelms the muzzle blast? For example, if the dB of the muzzle blast is 135 dB, and the sonic Crack is 140 dB, even if you suppress the muzzle blast, you still get a 140 dB sonic crack.

(dB numbers were just made up to illustrate a point, not to imply actual measured numbers).

[target17]

OK, help me out here. IT will suppress a .223, it will suppress a .22LR pistol, 3.5" barrel, using high velocity ammo, but will not suppress a .22LR rifle, 16" barrel using the same ammo!!!Thanks Tom

[RenegadeGlocker]

The ammo is supersonic out of a 16" barrel, but not a 3.5 barrel. Also, it is naturally more quiet from a muzzle blast perspective out of the longer barrel,so there is less muzzle blast to suppress.

[target17]

RenegadeGlock
I do appreciate your taking the time to explain what is causing the difference in sound levels. The reason I haven't ask before now, is, I new I would get a answer & still not understand. The only thing I got going for me is I can enjoy popcorn with out knowing exactly how it works! Thanks again. Tom

[BlackBelt]

have you tried subsonic .22 lr ammo?

[target17]

Blackbelt: Yes I have & it works very well,but not noticeably more so than standard velocity. Also I was told there is a better chance of baffle strike with subsonic. .22 shorts in standard velocity or no quieter than .22 LR standard velocity & that was a suprise, to me, any way. I do thank you for your asking & I I'm learning slowly, from doing, not reading. How ever I do appreciate any & all in put!! Tom

[agalb]

.22 rifles are "quiet" to begin with, so most suppressors don't seem that effective on them. Also, a suppressor designed for a .223 (high pressure, lots of gas) will not be as effective on a .22 as a unit made for .22LR (low pressure, little gas).

[target17]

Agalb: Believe it are not I had wandered if that might be part of it!
As for as it quiting down a standard .22LR on my 25 yard in door range, if your standing next to it, the sound of the impact down range is louder than the gun, but does nothing for high velocity. Thanks Tom

[ColGlock]

OK lets try this again.

First of all .22 LR Rifles suppress very well. unsuppressed is normally 139-142 db range, most suppressors will take you down to the 120's, a few into the teens.

What you are hearing is the sonic boom reflecting off of your floor, ceiling, walls, and backstop. If you take that rifle to an outdoor range of say 100 yards, you will be able to hear the difference and the delay between the gunshot and the sonic boom.

recommended reading material:
http://www.silencertests.com
Al Paulson's two Silencer books.

[UZIFORME]

Walther P22 barrel is too short to go supersonic even with high velocity ammo.

22lr barrel is longer. Reminton Subsonic Will work well. CCI Subsonic will work well except in match chambers, Winchester Dynapoint from WalMart will stay subsonic.'


What you are experiencing with the .223 ammo is you are going from Really frigging ear splitting loud, to just kinda supersonic loud. With the .22lr you are going from kinda loud, to a little better than kinda loud. So the difference is not so noticeable.

[target17]

UZIFORME: Good old common since logic, I like it!! Thanks Tom

[Panzerfaust]

OK, help me out here. IT will suppress a .223, it will suppress a .22LR pistol, 3.5" barrel, using high velocity ammo, but will not suppress a .22LR rifle, 16" barrel using the same ammo!!!Thanks Tom

OK, here's another point of view....

A .223 suppressor levels out the blast considerably, considering what you're shooting, which is quite loud in all aspects. The round is supersonic, and no amount of suppression will help this.

Attached to a round that is already not as noisy as a .223, the suppressor will not be as effective on it, because it does not operate at the same pressures as a .223, and its muzzle blast is already several times quieter than a .223.

Now, using a 3.5" barrel, gases will escape the muzle at a much higher rate than you will have from a 16" barrel, and the snap from an unsuppressed pistol using the same ammo should be greater than the rifle because of this. When suppressed, the bang from the pistol will be quieter, and thus, dramatically less noisy than unsuppressed. The rifle, on the other hand, which theoretically (and practically speaking) will not be as noisy as the pistol, and the crack will be less, unsuppressed. Suppressed, it will make less of a difference than it will on the pistol.

The only thing a suppressor does is suppresses the sound coming from the crack of the barrel, leaving the sound from 3 other possible sources.

1. Crack from supersonic ammo. (Eliminated by using subsonic ammo)
2. Crack from the chamber as the weapon is cycling. (Eliminated by single-shot/bolt action)
3. Action of the gun. (Eliminated by single-shot/bolt action, but only if action isn't cycled)

That's the physics behind it.

[target17]

Very good, & , very understandable!! Thanks

[Panzerfaust]

Hey... my pleasure...