Armed with a stopwatch and my Sig, I realized very quickly, the lack of efficacy of UOC.
Although a wholehearted suppoter of UOC for political statement, neutered right and general defense, I fully see its inadequacies.
When considering the Tueller drill, (has anyone been successful in accomplishing it within time or modified with time?), I start to wonder what distances can be considered reasonable to feel threatened. With a court of law in mind.
Obviously, opening fire on someone at the edge of your property is not an immediate danger to you, whether or not they had a knife. At least, it would be impossible to conclusively prove in a court of law.
I factor in a retention holster, drawing and loading the mag to the drill, extending the time/distance of the drill, and come up fruitless.
Being forced to choose UOC over disarmament, doesn't change the reasonable distance to open fire on an attacker does it?