The crimp was set just via the instructions that came with the die. As I noted, it only affected 5 out of 50 rounds but I'll be backing it off and seeing if that improves things for the next batch.
Originally Posted by bulwnkl
I'm late to the party, but I see buckled shoulders. Those are coming from _way_ too much crimp, or from defective parts. Stop crimping altogether for a few rounds, then start with a LIGHT crimp and see what happens.