I've seen a lot of surveillance videos posted on youtube showing armed civilians legally defending themselves against armed an attacker/s. 99% of them either get dropped or run away after the first or second shot. There is an argument whether capacity is an issue or not. Is a 17 round magazine better than a 5 shot revolver? Probably, however as I pointed out most civilian armed encounters are resolved within 1-3 shots fired. There have been times when LEO or civilians have fired more than 3 rounds. Fired up to 15-20 rounds, but that is a question of shot placement & training rather than a major gun battle.

I feel perfectly fine with my 642 and a speed strip of Remington G&W box of 38 special +P in my pocket.