Case Issue?

I'm pretty sure this is a case issue but not certain, so would like some input. I loaded up some 9mm with CBC cases and the the bullet is bulging from the case. I was using sierra sports master 125grs bullets and went to the range and 1 round got stuck in the chamber. Got home and not only was the bullet bulging, it seemed it went in crooked, hence jammed in the chamber.

I measured the bullets and the specs were correct, oal was correct and tested by using hornady 124gr xtp and the same bulge appeared. I do have other cases loaded with different head stamps and either there is no bulge or very slight one. The pic below are with the hornady bullet. 2 are upside down to get a better view of the bulge but doesn't really show the amount of the bulge in them. These chambered fine and pass the plunk test. In any event these cases are going in the last resort pile. Thanks in advance.

Thanks guys for all the great advice, since I'm only having this issue with the CBC cases, I'm gonna put them in the last resort bin. Going forward I'm gonna be a little more diligent checking cases.

So, took some of everyone advice and checked 5 other brands (headstamps) cases and tried to determine if it's my dies and none of them produced this issue. The expander ball only bulged the CBC case. Bullets went in smooth and no bulge. Wall thickness on the CBC ran approx. .002-.003 thicker then all the other 5. Never had this issue until I added different brands, I usually stayed with 1 or 2 brands but with this shortage I decided to grab as many cases as I can. So, CBC cases will be put aside in the last resort pile.