Carbine reloading dilema ... Bad primers or what?????

[DaveHH]

are the only ones that I've ever had misfire. I can use 30 year old CCI SR primers and they all shoot just fine. I think that it is a quality control issue.

If the cases are trimmed too short, then the only thing holding the primer near the bolt face is the extractor. I guess that in theory, there could be a little slop there and the space between the primer and bolt face could be excessive. I do know that GI rounds fire flawlessly and my reloads do occasionally have some problems.