I took my new M&P 9mm Compact out for its maiden voyage today and I have to say, I am not too happy. Shooting Speer Lawman 124 grain FMJ and 124 grain Hyda-Shok JHP, I experienced numbeous times, the slide locking back right before the last round (in other words the slide would lock back and the last round would remain in the magazine). It didn't matter whether the magazine was fully loaded or partially loaded, and it happened with both magazines. It also got worse, the more I shot - in all I put 200 rounds through the gun. Anybody know what is causing this? Could it be the magazine springs? Thanks. :?