Well i don't even where to start, as this is the first time I had this issue. Just bought the gun and shoot about 40 round of Aguila 95 grain thru it today and had this problem about 3-4 times. It would happen when I'm on 3 or 2nd round. My thoughts are, that this is a mag issue, because the lips on mag are not long enough to hold/level the rounds(you can see it in pic how much play there is between the rounds). I don't know I'm open to suggestions, I don't want to send it to Smith and Wesson just as of yet. The gun it self functions perfectly on target(surprisingly accurate, and not much recoil). Also I should ad the mag rattles, well the rounds do, I usually smack the back of all my mags to line up the rounds(its OCD thing), and the rounds usually line up and no rattling sounds after that, but with this mag they always rattle no matter when I smack it. I guess adjusting the lips more? Like I said open to suggestions. Thanks