I use Hornady's 115gr Critical Defense in my regular carry gun, a Kahr PM9 ... it's very accurate (if I'm cooperating that day) and has never caused a failure of any kind. A little hard to find, but worth the effort. My understanding of the round is that the little red ball in the hollow keeps it from filling with cloth or other junk the round may pass through and then helps greatly with expansion when you reach soft tissue. Critical Defense is about all I carry; I have it in a j-frame I use for dog-walking and am eagerly awaiting the promised .45 round, which after testing will go into my nightstand Springer Loaded.