The 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, when the die is properly set. If there is no powder charge in the case 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 allowing you to easily see the case is over-charged.
Please contact Hornady directly with any concern about performance, manufacturing defects, or warranty issues. Their contact information is found on their web site www.hornady.com. Their main switchboard phone number is 308-382-1390 Monday thru Friday 8am to 430pm Central Time.