The Hornady Lock-N-Load Bullet Comparator Insert #28 is designed for precise measurement of 7mm/.284 caliber bullets during the reloading process.Hornady Lock-N-Load Bullet Comparator Insert #28Specifically designed for 7mm/.284 caliber bulletsCompatible with Hornady Lock-N-Load measurement systemsEnables consistent bullet seating depth measurementEssential tool for precision handloadingThis precision insert allows reloaders to achieve consistent bullet seating depths and improve accuracy by measuring bullets from the ogive rather than the tip ensuring more reliable cartridge overall length measurements.