Double check the flash hole's size. I got a bag of 9mm Dynamit Nobel that had flash holes that are way undersized. The case head has a DAG headstamp. At first I thought that I had super tight primers, but after a short while I knew that there had to be a problem. My decapping pin was turned into a punch that forced it's way through the hole. If I didn't figure out the problem as quickly as I did, my pin would have broken also.