Dillon Precision Dies are engineered to give the very best performance, durablity and reliabilty on your Dillon Reloader. Hand made from the highest quality sintered carbide , Dillon dies are hand finished to exact standards. All Dillon Pistol Die sets include a size / depriming die, seating die and a separate crimp die (taper crimp for auto cartridges, accu-crimp for revolver cartridges).Dillon sizing/depriming dies feature a unique "floating decapping assembly" with a snap spring that throws the spent primer off the pin and eliminates the problem of primer "draw back" that often occurs when decapping military brass. The primary feature of Dillon's size die design the long, tapered carbide ring with a radiused opening, remains unchanged. The radiused opening, and its importance to progressive reloading, is one of the reasons why Dillon seat and crimp dies are better. Dillon Precision engineers found a way of manufacturing these dies that has enabled them to make the lead-in radius ...