This dataset clearly has issues, but [it's less than 50% one-shot stops for handgun rounds.](https://www.tierthreetactical.com/analyzing-1800-shootings-which-caliber-has-the-best-stopping-power/) Rifles and shotguns are vastly superior to all handguns. ~10-15% of assailants don't stop regardless of the number of shots. This is why militaries have drills to follow up with head or pelvic shots if the center of mass shots do not drop them.