What brand cases were involved? I experienced problems with cases bulging and a few burst in a Beretta pistol. Faulty cases were PMC. A noted Gunwriter (not on this forum) witnessed this activity and said the PMC cases had a thinner web at the base of the case and were weaker as a result. I got home and pulled some bullets in several case brands, cut the brass longitudinally and and the PMC were thinner where the base transitioned into the case wall. The failures were aggravated by the base not being fully supported when chambered. I ended pulling nearly 1000 bullets and disposing of the PMC brass. Years ago and no problems since.
These were reloads with a nearly max powder charge as listed in my loading manual.
