I have a new PPK/s that will only shoot Velocitors or Stingers. Anything less than 1400FPS will not function. It even has FTF and FTE's with Mini-mags. I've shot about 400 rounds through it and hoped that it would be broke in by now. I clean it after every range visit. I want to like this this gun. It's fun and feels well made, but only functioning with high priced ammo kind of defeats it's purpose. I'm considering contacting Walther. Has anyone had any success doing that?