This is a wonderful gun with an irritating issue. Last time at the range, mine stovepiped the last round of every magazine (50 rounds WWB). Didn’t matter which of the factory mags I used, both had this issue. I also think it’s a spring issue, too loos, too strong IDK. we are going to the range tomorrow again and I am going to shoot keeping my thumbs completely off the gun. Could be one of my thumbs touches the slide as it recoils back, with those light springs, maybe preventing proper action. If I can’t figure it out, I’m just going to sell it. I have an M&P Shield 9mm that I just love.