/Good article but when I reloaded I used the primer flattening method. For me they only flattened when I was close too, at or above the maximum recommended loads. I liked ball powders because they worked so well in my powder measure but you have to run them at higher pressures or they don't burn clean. The primers started flattening and I'd back down from that until they didn't It seemed to make sense to me. Especially since I never had factory ammo primers flatten.
