Shoulder set-back .30 Luger
I had always loaded bullets with a cannelure, roll-crimping as the final step.
I just loaded some 90gr. XTPs with no cannelure, and an ejected live round showed the shoulder had collapsed; is lack of crimp creating excessive case OAL, and the case mouth is being jammed against the end of the chamber?
It's possible the case is slightly long, as I did not measure any after the last shooting/loading, and that, combined with no crimp?
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