Roll Up The Rim isn't as much fun as I remember.... Check my work?

[I Dont Care About You]

Is your seater die set too low and the crimp is crushing the case back? I’ve wrinkled afew 357 that way before.

THIS is the correct answer. The seater die is set way too low. The die is trying to crimp the bullet into place before the bullet is completely seated. Hence the crushed case.

Back the seating stem out and then back the die out. Run a belled case up into the die and then screw it down until you feel the die impinge upon the case mouth. That is when the crimping begins. Adjust the seater stem in to the desired seating depth.

 

[Dark Alley Dan]

Thanks again, folks. Amazon has delivered my new crimper die. I'l let you know how it all turns out.

Reckon I'll seat first, then crimp as a separate step with a different die. It's one more step, but I'm not in a hurry.