A-ZOOM Action Proving Dummy Round, .300 Win Mag, Snap Cap, Package of 2

A-Zoom Action Proving Dummy Snap Cap are precision machined from aluminum to exacting tolerances. They feature a hard anodized finish that provides ultra-smooth functioning and long cycling life. These are perfect for dry fire practice, training and fuction testing, and teaching safety or storing your firearms with the spring relaxed for longer spring life.