I have a P99 in 9. It has functioned flawlessly with several brands of ball ammo at the range. When carried, I use Speer Gold Dot JHP. The other day I put a fresh mag in with the Speer and it had problems stripping off or chambering the rounds. I tried this several times. The slide would not return completely to battery without a manual assist. Any ideas? Do I need to polish the feedramp?