With a 4 die set, the bullet seating die may also have the ability to apply a crimp. But the 4th die is a dedicated taper crimp die so it will be suggested to back the seater die body out enough so that it doesnt apply a crimp, only seats the bullet. The crimp is them applied with the dedicated crimp die. Dont confuse this with a crimp not being recommended. Im not implying that you are, just not sure what you know, so Im mentioning it. I know that most veterans here do suggest that you indeed apply the taper crimp to the suggested "spec" (.468 - .471 usually recommended).