I bent a MA pin the first time I used it on my progressive. I was using the thinner pin for Lapua brass but on range pickup 9mm. I thought I was just punching out a Berden primer or small flash hole Norma brass because it took more force than normal. Turns out the case had tilted and it was punching the case on the diagonal. It really wrecked the case and also bent the pin. My fault for not stopping when I felt heavy pressure.
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