Tueller Drill: Inside 21 feet, pistol v. knife, the one with the pistol is going to get severely injured. The one with the knife may die too, but at that range it’s time to “stop the threat” if there is an immediate danger.
Yup. I bet very few of us have heard of Dennis Tueller. Except for close combat drills, most of our range drills are at 21 feet and greater.