Lee Precision Factory Crimp Die .458 Socom 90815

Lee Precision Factory Crimp Die Socom 90815 Lee 458 Socom Factory Crimp Die crimps the bullet in place more firmly than any other tool. Tests demonstrate that even bullets which have no crimp groove will shoot more accurately. 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.