When the P3AT is all that will fit, I carry mine with the Santa Barbara surplus stuff. It still managed over 1000 fps from the short-barreled KelTec in my own testing. The bullet is not an expanding design but has a decent flat nose profile, slightly concave. I'm looking for deep penetration with my use of .380 ACP for self-defense. I don't much care for the P3AT. For its size though it's a whole sight better than a .25 ACP.