I voted "Pistol or revolver with multiple reloads." For the past few years, I carried a Shield 1.0 with two spare mags very nearly 100% of the time. I've recently switched to the Shield Plus, but I'm not sure how to categorize it. Double stack? Single stack? Dingle stack? In any event, I like having the spares: (a) to balance the load on my belt; (b) in case of malfunctions; or (c) in the event that I need to shoot a whole bunch of times. At the moment, spare Shield+ mags are unavailable at anything less than wholly ridiculous Gunbroker auction prices, so I'm carrying a 13-rounder with the 10-rounder as the spare. When mags become available, I'll go to 13+1 with 2 spare 13-rounders. Then again, if my Shield 45 gets to acting right, I might carry that with 7+1 and a couple of 7-round spares.