- Having a job in an Atlanta morgue is job security at its best.
This comes from a text written by a person who preforms autopsies on people, often people who hae been shot to death.
It includes a profound explaination on calibers and their relative "effectiveness".
In my opinion: before anything, use a weapon you can and will use when the cards are on the table. Don't use a .40 snubby if you can't handle the kick, don't carry a gun if you don't have it in you to pull the trigger.
In that latter case, carry a stun gun or chemical propellent (if those are legal in your AO)
Hat tip to the real gun guys.