I have a CharterArms Path Finder 22LR Revolver, last time at the range put about 50 rnds thur her. The last few loads I noticed it was hard to eject the spent cases. I brought home some spend cases to use if I wanted to dry fire the revolver, well the cases will not fit back in the chambers. They were bulged at the base of the cases! The question is, is this normal for a used rim fire 22lr or is it a case of cheap ammo. I was using winchester 22lr from the 350 bulk pack.