Shorty's post got me thinking. I can't remember a missfire with my any of my revolvers, but I've had them with every other percussion gun I own, rifles and pistols. Oil and fouling that was missed during cleaning just doesn't collect in the nipples on a revolver, like it will in a single shot's drum. Rifles are even worse when stored muzzle up, everyting runs into the breech. I never popped caps on my revolvers because I was to cheap to waste six of them, but I have had to pop 2 or 3 to get a single shot pistol clear.