Traditions Shotgun Snap Caps. When you safely store your unloaded gun put a snap cap in the chamber and fire your rifle to allow the firing pin to lay at rest. This will help prevent firing pins from breaking in the future. Snap caps are also a great tool to practice dry firing your guns to teach safe gun handling improve your shooting skills and tune your trigger. Specifications for Traditions Snap Caps Shotgun .410 Gauge Per Package ASG410: Type: ACCESSORIES - GUN ACCESSORIES - SNAP CAPS Gauge: 12 20.410 Ga. Master Model Header: Shotgun Plastic Snap Caps For more great deals on Snap Caps by Traditions please browse our Traditions Shooting Accessories page.