I contacted American Tactical Imports about the bulging primers. They stated the ammunition could be too hot of a load, which with the 115gr 9mm factory load isn’t very likely. The second possibility is that it is too light of a load. They suggested I try a 124 grain bullet to rule out ammunition. If it is not ammunition it could be a head space issue.
![](https://i.ytimg.com/vi/bIduvCQN3wk/maxresdefault.jpg)