As incredible of a shot as that last one was it makes me wonder if the BG didn't fall at that point from the first shot.
Also, if you're in a position to barrel stuff the guy and are on a limited round count budget I'd go ahead and take this rare opportunity to go for a head shot. As close as he was if he was going to take only one quick shot might was well make it between the eyes.
Lots of people loves them some wheel guns for CCW but this video is why I prefer semi automatic handguns. Easier to conceal in the right place and probably more importantly more rounds to go around when your BG ends up being BG's which is often the case.