This bushing works with the 284 Winchester, 7mm Remington Magnum, 300 Winchester Magnum, 8mm Remington Magnum, 338 Winchester Magnum, 375 H&H Magnum. 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.