When I bought my PK380 a few years ago, the forums spoke and the Hornady Critical Defense seemed to work best with that pistol. It is an expensive practice round but good for carry or home defense. I just picked up a PPS M2 LE. I am looking for a practice round that works well with this pistol...

This is embarrassing, but here it goes; like a dummy I tried using 9mm Makarov in my PPX, (which fires 9mm Luger) and as a result jammed the weapon. The slide won't budge and I'm at a loss as to how to fix it. Please advise!