RCBS X-Die 308 Winchester Full Length Sizing Die

The X-Sizer Die features a specially designed mandrel that eliminates the need for repeated trimming after an initial trim of .020" off the maximum case length. The mandrel contacts the case mouth during sizing and reduces the growth rate. Because of an extremely close tolerance between the mandrel and die neck wall, the neck wall of the case does not thicken as the case length is pushed back. Cases repeatedly sized in the X-Die will initially grow a few thousandths of an inch, then stabilize be