Ppq slide lock problem

I have had a ppq for a year and last month it was stove piping every other mag. I emailed walther and sent it in and they replaced the trigger on it. Pretty good service on it.Now anytime I fire range rounds the slide sticks open every third round. I'm holding it tight and it isn't a grip issue. The other thing is when I use hollow points(critical defense)it works perfectly.I'm thinking about trading it because it's supposed to be my primary carry but for the time being I am switching to my ruger sc9s and glock 30s.I'm thinking about getting a g19. What do you guys think? Any ideas? via /r/CCW http://ift.tt/2vd9X0B