Quote:
Originally Posted by Rastoff
The more gas pressure there is, the better the brake works. The .223Rem generates about 55Kpsi at the chamber.
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It also the volume of gasses generates. A 308 has the same gas pressure as a 223, but the volume is is more. My 223 uses 25 grs of varget, while the 308 used 44 grs of varget.