I've had my M&p 9mm for about 7 months now and about 1600 rounds of mixed manufactures ammo. Loved the pistol till around 1000 round mark, then started having FTE problems. Seems to happen once after 40 or 50 rounds and again after 40 or 50 more. No Im not limp wristing, :roll: no its not allways with White box ammo :roll: . Sent it back to Smith, they had it 3 weeks. Polished the barrel and ramp, replaced extractor claw. They shot it and said no more problem.Took it to the range today around 40 rounds later....FTE!When I lock the slide back and remove the spent case it doesent seem like its tight or stuck, gun just doesnt want to pull that sucker out! Anyone have any ideas? I'v shot reloads, W/W box Remingtons, same problem. Really liked this gun but Im thinking on trading for another G.... Never had any problems with those.Let me know if you have any ideas. Thanks!