Just had my second malfunction with my XDm.
I got my new XDm (.40S&W) in December and started shooting it in January. Since January 12th I have fired about 4,000 rounds through this gun. Most of the range days have been fairly intensive (200-500 rounds in a 4 hour block.) but I have had a few short range sessions where I fired 100 - 150 rounds (maybe 4 of those). About 600 rounds were fired outdoors in -25 degree weather over the course of 3 days, the rest were all fired inside, with temps around 60 degrees.
My previous malfunction was a type 3 (double feed) probably my fault for limp wristing the gun. This was back in mid January.
I am going through a training school right now and we were doing some shooting on the move today. I am moving across the range from the right side to the left firing at a line of 5 targets one handed at apx 15 feet. At my 3rd target, having only fired 6 or 7 rounds of my 16 +1 that I started with, my slide locks to the rear. I immediately grab a mag from my pouch, Drop the malfuntioning mag, slide the new mag in and run the slide. Didnt miss a step and completed the drill with 2 out of 11 rounds out fo the "A" Zone.
I dont see any damage to the mag nor any problems with the ammo. I didn't think that I was limp wristing.... but hey you never know.
At the end of the day I am still VERY satisfied with my XDm.