Thread: kick arse suppresor ?

Originally Posted by Cordite

What altitude do you shoot at? My mate in Twizel has a problem with most subsonic brands as the speed of sound is slower at altitude due to the less dense air, so many subsonics are not subsonic in the High Country. I can't recall which subsonic brand he finally decided was reliably subsonic for him, may have been CCI.

Interesting, because air density has virtually nil effect on the speed of sound. Temperature is the condition that has most affect.