Lee 22 ARC Custom Factory Crimp Die 6859BB44 LEE. Makes even the most difficult to crimp cartridges a delight to reload. Bullets do not need a crimp groove as the collet is so powerful it will form one. A firm crimp improves accuracy because pressure must build to a higher level before the bullet begins to move. This higher start pressure insures a more uniform pressure curve and less velocity variation. NOTE: This die is not carbide. Specifications for Lee 22 ARC Factory Crimp Die LTD PROD: Manufacturer: Lee Gun Type: Rifle Features of Lee 22 ARC Factory Crimp Die LTD PROD: Incorporates a collet to apply a rifle type crimp to the case Makes even the most difficult to crimp cartridges a delight to reload Bullets do not need a crimp groove as the collet is so powerful it will form one A firm crimp improves accuracy because pressure must build to a higher level before the bullet begins to move This higher start pressure insures a more uniform pressure curve and less velocity variation Package Contents: Lee 22 ARC Factory Crimp Die LTD PROD Incorporates a collet to apply a rifle type crimp to the case. Makes even the most difficult to crimp cartridges a delight to reload. Bullets do not need a crimp groove as the collet is so powerful it will form one. A firm crimp improves accuracy because pressure must build to a higher level before the bullet begins to move. This higher start pressure insures a more uniform pressure curve and less velocity variation. NOTE: This die is not carbide. LEE92080