Lee .38/40 Factory Crimp Die
This 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. NOTE: Lee Precision is phasing out the pictured storage boxes and replacing them with durable tube containers.