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.25 cal = .22lr ?


Ultrastu
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On 20/05/2018 at 21:08, DC177 said:

I think the 22lr is actually quieter than fac air. Views?

The loudest part of any shot with my Marlin is the bullet strike. There is a click from the pin going forward but thats about it. My .22 S200 has a moderator fitted and is also extremely quiet.

I would have assumed a .25 FAC with a suitable mod would be the same .....  is the pellet sub sonic ???

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Yes the pellet is sub sonic .around 880 -900 fps .

I always think of the speed of sound as 1111 fps .

It actually varies with altitude and air density etc .but can be as low as 1080  fps and as high as 1200 .depends on wind direction too .

This is why .22 lr subs run around 1050 fps .ie just under. .but some often just go super sonic with a loud crack as they sneek over with a bit more powder in the case .

Ps my .25 is quiet enough not to need an additional mod on the shroud .

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