500+ through my .40 with no issues. I am concerned that it is happening there is wide-spread topics on various forums and YouTube videos showing the problem. More concerning are the reports of people calling S&W and they saying there have only been a couple of issues. Surly thy are smart enough to turn on the google machine and do a quick search. I have no idea how many Shields have passes the production line so far, safe to say a lot! Maybe the limited number of reported occurrences is within their +\- margin of error? Even so, I would be a happy camper if the mag popped out every time I fired my new gun. Best of luck!