I'd be more concerned about your case capacity, a 151gr cast is pretty short. I run 190-225gr in my blackout and with such a large case capacity I wouldn't be keen to run a 151 in the blackout let alone a 308. remember if the primer can burn over the top of the powder when laying flat/chambered it can give you a very big boom that the suppressor wont help...
Anyway I run the 225gr eldm as a compressed subsonic load so I'm probably just as bad...
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