The .380's suffer in the short barrel. I prefer the FMJ for penetration and reliable functioning and there are some loads out there that step it up, but there is only so much that can be done with it.

Date: 122208
Gun: Kel-Tec P3AT
Load: .380 - Federal American Eagle 95 gr. FMJ
Average velocity: 795 fps
Comments: 133 ft.lbs. energy