I'm not a LEO or a Coroner. I do analytics. Seems to me, in all of these caliber debates, people are trying to use the probability of one event to predict the probability of another event without knowing if they are correlated.

As a civilian CHP holder, I carry to stop a threat that could kill or severely injure me or my loved ones (and possibly a stranger depending on circumstances). The statistic that matters to me is how often a particular caliber and type round failed to protect a defender from death or severe injury when it was fired in self defense and struck the BG.

One extreme could be that every BG that was shot with a .380 died, but before they died the BG was still able to kill or severely injure every GG that was using the .380 (or any other caliber).

OTOH, the other extreme would be that no BG was ever killed with a .380 fired in self defense, but no GG that used a .380 for self defense was ever injured or killed either. That would be pretty effective.

It's what happens to the GG that fired their weapon in self defense that matters (again - pick a caliber) .

The outcome for the BG might be relevant if there was some data that showed that the outcomes for the CHP GG and the BG are correlated. I've looked. I haven't seen anything that relates the two things.