Years ago I read that the average confrontation had 2.7 shots between the two...
Seems I remember Jeff Cooper sticking with the 1911 platform vs the higher cap semis saying "I can stop a riot with 2-3 shots, take out the first two guys and the rest will leave"...
You have 6 in that revolver, that's all you need...If you want to carry a couple of speed loaders, that's fine but I doubt you will need them...