Long long time ago, it was common place for the law dog, after the first shot to open the gate eject the spent case and replace it with a fresh cartridge. If it was all I got, I can get this done rather quickly.... fast draw was not the way of the west, but being advantaged from cover. Now this is not to say that I carry my SA for CCW, but I know I can accuratly draw and fire a SA with leathal results.
Believe me, "IF" you ever get into a situation where you have to defend yourself, your whole vision becomes focal, and then your whole world slows down. I have been in one such situation on the streets of Oakland, Ca. where the perp came out from behind a vehicle with a long barrel 12 ga. I went home that night, and he did not as he found a new resting place.
That was some 25 years ago, and I still live with it to this day.