I practice from 3, 5, 7 and
10 yards regularly. I've shot longer distances, but IMO it's unlikely I will have to engage a BG beyond 10 yards. If I did it would have to be outside my home, and I'd probably have to legally defend my decision to shoot instead of obeying my duty to flee. IIRC, I was told at my CCW class a year ago that most SD encounters are between 8' and 20'. Or ...