I had to trash several pieces of brass today due to bulges in the brass near the case head. I had shot and reloaded the brass several times and never noticed any pressure signs on the primer or case head before. I checked all the specs on the brass and all are good just starting to see a bulge about a half inch from the case head.

I have shot max loads and slightly over before but took care looking for over pressure signs at the time. I am not sure because I am not shooting on or close to the max charge for the round.

Reckon the case life has been reached or I am not shooting the correct propellant? Shooting a .243 and using 40.5 grains of IMR4350. Not seating to the lands. Seated .025" off.

Looking for some kind of feedback ideas of potential causes.

Thanks