To do it consistently, requires a well tuned accurate revolver. A single barrel with set trigger would be more likely to do it reliably. The old story, even a blind squirrel finds a nut now and then applies. yes a cap and ball revolver can do it once in a while, how frequently certainly depends on the gun and the shooter. I can do it with a few of my side lock pistols. It would be a much more difficult task with a spinner.