I changed my recoil spring and buffer in my CQB after about 4000rds. The gun functioned flawlessly until I made the change. I had about 6 FTE's in 150 rounds with the new 10G17 recoil spring and new shok buff tonight. I also put on the new starburst grips for the first time. Did I get the wrong spring? According to Wilson's site I did not. Perhaps it's my grip on the gun with new starburst grips? The cases would either eject straight back and get stuck on top of the next round or not get pulled out of the chamber all the way with the slide remaining part way back. Thanks for any suggestions. I'm shooting a COF on Tuesday and can't have the gun not functioning reliably.