Hi just finished my first 50 rounds of 9mm with my new to me 550b. Overall it was pretty great compared to my lee classic turret. However, i have noticed in checking many (+50%) of my rounds are not passing my case gauge. The bottom of the round is mushroomed somewhat nd the rounds do not fit flush in the gauge.
I figure i could make it work somewhat, but i must be doing something wrong in terms of setting up my dies. I checked all my dies, and found the bulge starts at station 1. Any tips or suggestions on what i can do to remediate this? I never had this kind of problem with the lee, so kind of stumpped here.
Thanks for the help ahead of time.
K