I have to confess, I've never run any .380 over my chrono. I frequently carry a Kel Tec .380, but do so having accepted the limitations of the cartridge. Doubt that any ammo available will make it into a 9mm, but welcome developments in ammo that makes the caliber more effective. My initial post questioning demand for a +P .380 was. With the current availability of 9mm pistols as small as, and in some cases smaller than, a lot of currently available .380s, more power is readily available without stressing the pressure limits of the .380 cartridge.
Savage