How to make a Air Venturi Avenge-X pcp quieter?

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Granniteguy

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I recently purchased an Air Venturi Avenge X pcp air powered pellet gun in .25 caliber and it's very loud. Does anyone know how to make it quieter?
I am using it on the low setting, and that is quieter, but it's still louder than my 22 shooting cci quiet ammo.
I've got the tank pressurized to 1500 psi instead of the 4250 psi it is designed for.
I have the hammer spring pressure backed all the way out.
The regulator pressure screw is backed out 1/8 of a turn setting the pressure at 1500 psi.
Would a smaller caliber help? .22 or .177 ?
Any suggestions?
 
I have not done what you are trying - I would go that the propellant gas / compressed air being released as the bullet leaves the muzzle is the disturbance that causes the "noise" or sound pulse in air? So, maybe a moderator or silencer? Not sure that the internal components or internal interactions within the gun have much to do with the "noise" - compared to the projectile emerging from the muzzle? One would think that larger diameter projectile, at similar speed, creates more "noise" = air disturbance? - hence going to smaller diameter might reduce the sound that is heard?

I would think once you have sufficient velocity for the projectile to be above the sound barrier in air, you will get a sonic "crack" as that projectile breaks through the sound barrier - nothing to do with the propellant forces - just the velocity of the bullet?
 
Granniteguy said:
I recently purchased an Air Venturi Avenge X pcp air powered pellet gun in .25 caliber and it's very loud. Does anyone know how to make it quieter?
I am using it on the low setting, and that is quieter, but it's still louder than my 22 shooting cci quiet ammo.
I've got the tank pressurized to 1500 psi instead of the 4250 psi it is designed for.
I have the hammer spring pressure backed all the way out.
The regulator pressure screw is backed out 1/8 of a turn setting the pressure at 1500 psi.
Would a smaller caliber help? .22 or .177 ?
Any suggestions?
Click to expand...

I am not familiar with this airgun. You say you have the tank set to 1500 psi instead of 300bar/4250psi. Why? What tank? What volume is it? Is the rifle regulated? If so, what is the regulated pressure set to on the plenum? What volume is the plenum? It might be dumping far more air than necessary when fired as there isn't enough 'back' pressure to close the port quickly, which will lead to explosive decompression of the far excessive amount of gas as the projectile leaves the barrel and a loud 'pop'. What is the chronographed velocity? No guessing allowed. Use a real chronograph and get real repeatable numbers. If it is supersonic, the projectile will be breaking the sound barrier and it will be as noisy as any other projectile of that size and mass breaking the sound barrier at that velocity. Nothing to do with the propellant. In my opinion, a chronograph is absolutely required, otherwise you will flail about forever chasing your tail, and in the worst case, you could severely damage the more delicate parts of the regulator by under or overcharging the pressures and volume running it.
 
I found shooting a target with a pillow behind it helps a lot, too.

Most of the sound from my experience was hitting the back stop.
 
Powerful PCP air rifles are loud. The only way to make it less loud is to make it less powerful.

Anything that can be attached to a firearm that makes it "quiet" is contrary to Canadian firearms laws.
 
Only real way making it quiet is making it sub sonic and making a range muffler. Range muffler is a padded box with smaller exit hole that you shoot thru. It's not a silencer as it doesn't attach to the gun. Some ranges uses tires, or drums to minimize the noise.
 
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