Myth 5: Dry-Firing A Gun Is Harmful
To be fair, this is sometimes true. Dry-firing most centerfire rifles and handguns is perfectly safe once you have made certain they are unloaded and pointed in a safe direction. However, excessively dry-firing a rimfire gun is a bad idea. The firing pin of a centerfire gun is designed to strike a primer located in the center of a cartridge's base. When no cartridge is present, the firing pin strikes nothing. With a rimfire, though, the firing pin is positioned to strike the soft brass rim of the cartridge. When no cartridge is present, the firing pin strikes the hard steel of the breechface. Repeated dry-firing of a rimfire can eventually peen the firing pin, dulling it and causing misfires. Dry-firing offers convenient, easy practice, but if you are going to dry-fire a rimfire gun, invest in some snap caps first. These dummy rounds will cushion the firing pin's fall.