Shooting paper and bowling pins are fine, but under duress, with no training, a revolver would be a much better choice.
Running a revolver, such as a K or L frame S&W, in the situation you have described above really isn't any better. Most people cannot run a 6 shot revolver double action and keep up with the speed or scores on paper as compared to a semiauto. Granted, paper is not a self defense situation, but if one cannot operate accurately and effectively under simple time constraint pressure, then one would expect to perform worse as there is significantly greater pressure. Add to that scenario where one has to reload and one comes out ahead even when utilizing common speedloaders or moonclips. Even a simple practice session such as; with the firearm concealed, draw and fire 2 rounds in 4 seconds - draw and fire 2 rounds in 4 seconds - draw and fire 4 rounds in 8 seconds, utilizing a shot timer and a K or L frame S&W will give somewhat dedicated revolver shooters difficulty.
Each particular firearm has its pros and cons, but all require some training, familiarization, and practice to operate effectively under duress. Learning to accurately and effectively run a revolver really doesn't require any less training, practice, or dedication than that required of a semiauto.
Generally speaking, most do not have the facilities available to practice holster drills, malfunction drills, reloading, shooting while moving, weapons retention, etc; all of which are very important.
