300 BLACKOUT BULK AMMO OPTIONS

Quoted: I don't know my rounds counts, but I've two .three hundred Blk SBRs both of those of them have properly in excess of that, most having a Suppressor and I have not had any troubles nonetheless.Nope.  You might be burning additional powder than .22 LR, plus your ear is true beside the ejection port, along with the buffer and spring bouncing