Like nemesis said, check extractor. BTW, I have a P-16 with Ed Brown ambi-safety & BT Grip, Novak Lo-mounts & 4lb trigger job. Sent to Para Ord for ParaKote refinishing & she is a beauty. Shoots great with Zero brand ammo although any brand will be fine. As Jim Scoutten says keep shooting and keep them in the 10 ring.