So from several tactical classes I have taken anything past the strong side position 3:00 could be a problem. Basic rule of thumb was to consider your target attacked and got you on the ground....I know everyone says I'd never let him get that close. I would say you would be very surprised how much ground a person can make up in just a couple of quick lunges.

Gander had virtual 360 degree simulators that we would practice on and there was one scenario where you confronted a man in a parking lot with a knife pacing back and forth. Actually with every movement he was closing the gap then at the last second he would sprint directly at you. The scene opens with him at 21ft moving side to side when it was all over I shot him at less than 4ft.

Something to think about,