Just took it out. In the first 20 rounds I had a fail to extract. Round went off, pulled the trigger again and got a click. I was using underwood ammo 180gr fmj. I ejected the mag, and when i racked the slide, the empty case came out. The gun is stock right now. Do I need a heavier recoil spring when shooting hot ammo like this? What could cause this besides the slide moving too fast? Update: Had 3 FTEjects this afternoon 6/14. It only did this with 165gr ammo. Pics included in later post.