Quote:
Originally Posted by CoffeedrinerinNC
A 308 has the same gas pressure as a 223, but the volume is is more.
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According to the SAAMI spec the .308Win is about 7Kpsi more than the .223Rem:
http://www.saami.org/specifications_...essure_CfR.pdf
Even so, volume of gas is a factor. I'm just not sure it's a huge factor. I'm sure a 12ga has more volume than either, yet the porting on a shotgun has almost no value. I believe this is due to the pressures being usually 12kpsi or less.
Meh, it doesn't matter. Muzzle brakes and compensators do work. That's enough for me.