If you search youtube, you'll find many instances of storekeepers attempting to deploy all many of firearms and who failed miserably. One in particular cost both the storekeeper and his son their lives when the storekeeper attempted to produce a gun against a drawn gun but had to rack the slide to chamber a round. Of course, the bad guy would have none of that and proceeded to riddle the storekeeper, then killing his adult son for good measure.

It's all in the mindset and training. Carry a wheel gun, a bottom-feeder or a belt-fed side feeder just as soon as one comes along. But, be the best you can be with what you carry. Do carry a spare mag. Besides spare ammo, spare mags are sometimes needed to clear a stoppage, particularly the double-feed, a stoppage likely to result in a high-anxiety situation.

Revolver fans must know how to reload in high stress situations without getting a shell casing under the extractor star. Do that and it's all over---they win.