I was reading an interesting analysis of "stopping power", which took a somewhat different approach. Most, that are or are claimed to be based on observed shooting results, use percentage of "one shot stops" as the sole yardstick.
Someone took a look at what happens when one shot didn't stop the altercation, which would include the results of a lot of shootings that would be excluded if you were interested in only one-shot stops.
What was discovered was that there really wasn't a huge disparity in handgun ammo performance in one-shot stop cases, but if one didn't stop it, there's a strong correlation between the size of the bullet and how many additional shots were "required" (fired).
So, if you know for a fact that a single shot is going to end it, you might as well use a .22, but if you don't know how many rounds it's going to take, it's likely that the bigger the bullet, the fewer additional rounds will be required.
I carry a .45 that's loaded 6+1, and sometimes carry a 9mm loaded 13+1, and I'm comfortable with either (and sometimes both).
Someone took a look at what happens when one shot didn't stop the altercation, which would include the results of a lot of shootings that would be excluded if you were interested in only one-shot stops.
What was discovered was that there really wasn't a huge disparity in handgun ammo performance in one-shot stop cases, but if one didn't stop it, there's a strong correlation between the size of the bullet and how many additional shots were "required" (fired).
So, if you know for a fact that a single shot is going to end it, you might as well use a .22, but if you don't know how many rounds it's going to take, it's likely that the bigger the bullet, the fewer additional rounds will be required.
I carry a .45 that's loaded 6+1, and sometimes carry a 9mm loaded 13+1, and I'm comfortable with either (and sometimes both).