Hey guys, I need a little bit of help. I just bought my first handgun (P320 compact 9mm) on Friday after doing a considerable amount of research. During the first 30 rounds fired I had one FTE where the slide came back, but the empty casing was only part way out of the chamber. The next day I shot about 200 rounds through it and I had one FTE myself, and a friend that I had with me had at least six or seven. I have shot Winchester white box 115gr. exclusively through it and at the time of me writing this I have shot about 400 rounds. Do you guys know what might be causing this? Is it something that I am doing wrong? I have a friend with the same gun and he has about 250 through his and he has had 0 problems... if that helps.