Lee Precision, Inc. .257 Weatherby Magnum Rifle Factory Crimp Die

The Lee .257 Weatherby Magnum factory crimp die secures the bullet more firmly than any other tool. Tests indicate that even bullets lacking a crimp groove achieve greater accuracy. A firm crimp enhances accuracy by requiring pressure to reach a higher level before the bullet initiates movement. This increased start 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