This bushing works with the 6mm Remington, 257 Roberts, 25-06 Remington, 7x57mm Mauser, 280 Remington, 30-30 Winchester, 30-06 Springfield, 7.62x39mm Russian, 303 British. This requires the LNL Comparator Body and a caliper to assess head space.
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.