After firing maybe five hundred rounds over the weekend in a handgun defense training, I had to use some Wolf ammo in .40. The Blazer Brass ammo I'd been using had worked flawlessly. After a couple of mags of Wolf I did a speed reload and the slide rack jammed open. This happened a couple of times. The instructor suggested I might need to do some repair or adjustment. Wondering if anyone has experienced stage three malfunctions with the MA40? How about with the Wolf ammo?