Going back to the mid-1800's to the mid-1970's when fast reloading was an issue, (and mostly it wasn't) most individuals carried one or more extra revolvers. If one went dry they would pull the other(s). Of course they weren't into double-tap shooting, and most of the survivors had the skill and nerve to make the first shots count. Those that did like the idea of continous rapid fire were not slow in adopting Colt's, Browning designed pistols that used box magazines, but even then would carry two rather then one. The concept of today's speed loaders was known in the 1890's but apparently never caught on.