The .224 Valkyrie factory crimp die secures the bullet more firmly than any other tool. Testing indicates that even bullets lacking a crimp groove exhibit improved accuracy. A firm crimp enhances accuracy by requiring pressure to reach a higher level before the bullet initiates movement. This increased starting pressure ensures a more consistent pressure curve and reduces velocity variation. Incorporates a collet mechanism that compresses the case mouth into the crimping groove to ensure a secure hold Compatible with all reloading presses featuring a 7/8-14 thread