Hornady Powder Cop

The Hornady Powder Cop Die has an internal stem that will move up to display a white o-ring that is even with the surface of the die when the correct powder charge is in the case. If there is no powder charge, the stem will not rise. If there is an overcharge of powder, the stem will lift the O-ring well above the surface of the powder cop die, indicating an over charge. Hornady uses a similar device on their own ammo manufacturing presses. It won’t replace careful attention, but helps monitor the reloading process