How do snap caps operate? Snap caps get the job done by enabling the firing pin to fall without possibly harming it by slipping on an empty chamber, ordinarily falling on the spring-kind button where the primer over a loaded cartridge is found. I exploit these to test my shotguns https://shotguns-shoot-practice-b46913.mdkblog.com/35354193/5-simple-statements-about-snap-caps-for-shotgun-explained