That is one of the hazards of plastic framed pistols; blow a case head in a 1911 or other metal framed gun and the gun usually survives; usually not with a plastic frame.
If the charge varied a lot, probably either some of one charge got carried over into a 2nd charge, but also possibly it fired out of battery.
But anyway...Did the OP ever buy one of the AR57 uppers? I've been interested to hear how they shoot.
Tex, have been ill for a while and not following this.
yes i got the upper and it shoots great. the draw backs to the ar57 uppers is the long magazine makes it hard to mount optics. other then that it is a fun platform. can't wait for the ground squirrels to wake up.
