It can handle +p ammo, like has said it will require more mnx. Of course 95% of the ammo that comes out of my PPX, hell, any of my handguns actually, is FMJ. I normally shoot +p at first or +p+ depending on the gun when I first get it to make sure the gun runs with it.Check the owner's manual. Walther does not recommend +P and +P+ ammo in its pistols. You'll also find many references to this by running a search; it's been covered in a number of threads.