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Lee Reloading Equipment always great value & quality
Designed to ensure that each round of reloaded ammunition has the precise crimp. The Factory Crimp Die crimps the bullet firmly in place with more uniform pressure than any other die. A collet on the Factory Crimp Die squeezes the case mouth into the crimping groove for a secure hold. This is the same type of crimp on factory ammo. It is nearly impossible to buckle the case when crimping when compared to a regular roll crimp die. Lee's testing has shown that using a Factory Crimp Die provides a more uniform pressure curve, increasing the accuracy of any bullet.