This issue has been plaguing me for a while. And with the ammo short I cannot get to the range to figure it out. I have done some serious fluffing and buffing to help with break in. I have narrowed the issue down to one mag, so at least I am comfortable the gun will operate with one of my mags. The mag with the problem kicks out of the gun when I try to chamber the first round into the empty chamber. As the slide goes into battery the mag just pops out about 1/4 inch. Sometimes I cannot even get the mag inserted and secure. I have tried to -1 the mag and no help. Also it's I'm not hitting the mag release. I have tried to measure both, and they seem the same. Anyone experience this? I believe it is the extra mag I bought that is the problem. Would really like to fix it to carry the extra mag. I finally got some .380 ammo so I hope to get to the range to test it thoroughly soon. It concerns me that the mag will jump out while I am carrying it. Thanks.