I bought a box of Federal .22LR Punch ammo today just to see what it does. I decided to just throw a round in my 10/22 with the bolt lock on and launch it through my Dead Air Mask at my bullet trap in the garage. I didn't put any ear protectors on as it is rated at 1070 (same as Standard Velocity which my Mask quiets down to almost nothing). However, when I touched it off, it sounded like a unsuppressed standard velocity round. 
Tried another and got the same. I decided I would stop experimenting and see if anyone has any idea what is going on. Just to make sure I wasn't going nuts, I fired off a mag full of CCI SV and didn't make much more noise than the clang of the steel backstop.

Tried another and got the same. I decided I would stop experimenting and see if anyone has any idea what is going on. Just to make sure I wasn't going nuts, I fired off a mag full of CCI SV and didn't make much more noise than the clang of the steel backstop.
