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We shoot factory loads through suppressed AR rifles all winter w/o any issue what so ever and those are at the top end of the loading scale.
The only thing a suppressor affects is the residual gas in the bore after the bullet is past the muzzle. This "back-pressure" in the bore and muffler body is what blows crud through the DI gas system and past the fired brass as it's being extracted. It's NOT so much the residual pressure, it's the VOLUME of the residual gas in the muffler looking for someplace to vent.
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