But root cause unknown:  The attached pictures picturing lightly used BCM FP (top) and lightly used 9mm CMMG RDB FP (bottom) tell the tale.  I do have an inquiry into CMMG and I expect they will be very helpful as they have in solving my ejection problem, but what could possibly cause this?  90% of rounds with my ADM lower/Velocity trigger and the remainder with CMMG lower and BCM lower.  The Velocity is their AR trigger.  The only thing I can think of is the hammer striking the FP off center and I am using (hard) CCI primers?  Defective FP material? I would say the upper has seen 500 or so rounds.  I've ordered two BCM FP has spares and probably will use the BCM in tomorrow's match.

Attached File
Attached File

Damn are they getting those from china?

Wow, here's what my CMMG firing pin looks like after around 3000 rounds:

CMMG firing pin Pic

My experience with lite primer strikes was this........chamber cut too deep.................