The crimp die is cartridge specific. It holds the round as you run the ram up and the shell holder contacts the collet slide to push it up into the die to constrict and crimp the case mouth. Adjusting it deeper runs the slide higher into the die creating more squeeze. The top is open, so it has no effect on seating depth of the bullet.


"Civilized men are more discourteous than savages because they know they can be impolite without having their skulls split, as a general thing."
Robert E. Howard