I have a P99 in .40S&W and I have been out shooting twice with it. (we don't have a range ere so I have to go out in the country side to do so) the first time out, I fired about 50 rounds and the gun never jammed, I think I was using FMJ. then when I was out again I bought a large box of Remington 180 gr. JHP ammo eventually I started getting jammed once when the casing didnt eject al the way and the other times the ammo failed to feed al the way in. happened twice when I was chambering too. Can anyone tell me what is wrong?