Geez, and I had almost completely shaken those "failure to stop" nightmares. Anyway, like others have already commented: handguns are a marginal stopper at best. Sure, the assailant dies, eventually, but what we all want, I assume, is an immediate cessation of the attack. Given the dynamic nature of gunfights, the ability to achieve "well placed hits" becomes somewhat problematic. Yet, to have an even chance at stopping the assault this is most often exactly what you need with handgun defense. Anyway, I still carry the .40S&W cailber, the moderately light & fast 155gr JHP formats. I shoot the caliber (and firearm) moderately well, it's moderately powerful with adequate "ballistics" (for a handgun), it's habit, and I'm still alive.Stay safe.