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"Super-sonic" question...

 
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  #1  
Old 01-04-2005, 03:44 PM
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Join Date: Dec 2004
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\"Super-sonic\" question...

Hey Guys,

Will a silencer quiet down a super-sonic crack? Does it work at all when the bullet goes super-sonic?

Thanks
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  #2  
Old 01-04-2005, 04:35 PM
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Re: \"Super-sonic\" question...

silencer's only work if your bullet is sub-sonic.
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  #3  
Old 01-04-2005, 04:46 PM
 
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Re: \"Super-sonic\" question...

It will drop the noise level a bunch but if the bullet is still comming out faster than 1100fps its gonna have a crack to it , I have a 308 with a silencer , it sounds about like a 22LR with regular loads.
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  #4  
Old 01-05-2005, 10:04 AM
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Join Date: Jul 2003
Location: Central PA
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Re: \"Super-sonic\" question...

they WORK with any ammo, but the "hollywood" quiet doesnt happen till you put sub ammo thru it--stick with 1050 or lower--I have had a crack at 1090fps.

I shoot my 223 with it all the time with 50gn vmax at 3500fps--I love it!! can shoot w/o ear protection no problem--i agree--sound like 22RF.

the 308, i would compare to a stinger 22LR

YMMV,
JB
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  #5  
Old 01-05-2005, 06:13 PM
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Posts: 302
Re: \"Super-sonic\" question...

I tinkered around with this a couple years ago making my own silencer (yes I know it is illegal ) I found out by experimenting that atleast with the technology I had if a bullet goes supersonic a silencer is useless, if you keep the bullet subsonic my highly modified Kawasaki KX500 muffler worked like a charm.(a bit heavy though)
B
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  #6  
Old 01-06-2005, 06:11 AM
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Join Date: May 2001
Posts: 2,369
Re: \"Super-sonic\" question...

I believe you'll be happier calling them "suppressors" rather than "silencers".

They suppress the noise associated with the expanding gases used to push the bullet from the bore. They DO NOT suppress the sounds made by the projectile.

The super-sonic "crack" is a projectile related sound/event. The projectile is beyond the confines of the barrel and suppressor when the "crack" sound is made so there's no way for the suppressor to do anything for this type sound.

Suppressor "suppress" the muzzle blast sound signature, muzzle flash, dust/debris signature and reduce recoil. They also get HOT and create mirage problems when used in sustained fire situations.

If you fire sub-sonic ammunition and have a quality suppressor the critter you are shooting (or shooting at) will be able to hear the round coming (and if you miss) will also be able to hear the round going past and beyond. This is because the projectile is traveling slower than the speed of sound allowing the "whoosh" sound of the disturbed air to arrive before the projectile. After a little practice people can often easily identify the direction of the source of the incoming projectiles when sub-sonic ammunition is used. When the rounds are super-sonic the "crack" is made by the pressure wave pushed by the projectile will be heard as if it came from about 90 degrees to the source of the projectile. The target will not be able to hear the round come or go, it will be able to hear the secondary "cracks" as the projectile passed obstructions along it's flight path and the impact sound. The projectile impact sound at it hits the intended target or anything else is of varying intensity and can be quite loud...we often hear this same sound when shooting once the distance (time of flight) is sufficient for the two sound events to be differentiated by our ears.

They're suppressors, not silencers.
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  #7  
Old 01-06-2005, 01:15 PM
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Re: \"Super-sonic\" question...

So what dave is trying to say is :

THEY ARE NOT USELESS WITH SUPERSONIC AMMO!!!! [img]/ubbthreads/images/graemlins/laugh.gif[/img]

Sorry for that dave [img]/ubbthreads/images/graemlins/wink.gif[/img]

They are quite a relief when using full-house ammo in the field.

BTW--they reduce recoil as well [img]/ubbthreads/images/graemlins/wink.gif[/img]

JB
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