My 2 P3ATs choked on 90 grain Independence FMJ round nosed ammo with Failures to extract. I had no other FTE with this ammo in a NAA 380. I switched to 95grain FMJ Magtech and had 0 problems with extraction. The P3ATs are first gen with the non "Frankenstein" extractors. The Independence ammo did not feel under powered. Any opinions on the FTE cause ???