Lee Precision Factory Crimp Rifle Die Features The Lee Factory Crimp Die for .338 ARC applies a uniform crimp to the case mouth after bullet seating helping secure the bullet against movement during feeding recoil and magazine cycling. This is particularly valuable for semi-automatic .338 ARC rifles where cartridges experience more handling stress than in a bolt-action platform. A consistent crimp also helps maintain more uniform chamber pressures from round to round supporting more predictable velocity and accuracy. As a limited production die it is built to the same quality standards Lee applies across its reloading die lineup. This factory crimp die is intended to be used as a finishing step after sizing and seating a .338 ARC cartridge rounding out a complete reloading sequence for the cartridge. Reloaders loading ammunition for semi-automatic .338 ARC rifles will find the extra security of a factory crimp especially useful for feeding reliability. Consistent repeatable crimping also reduces the chance of bullet setback during chambering a safety consideration in high-pressure cartridges. For .338 ARC handloaders looking to complete their reloading setup the Lee Factory Crimp Die is available for sale at GrabAGun. Lee Precision Factory Crimp Rifle Die Specifications Manufacturer: Lee Precision Reloading Caliber: .338 ARC Reloading Die Type: Factory Crimp Die Available At: GrabAGun