The Competition Pro Series, for use in progressive reloading machines, is a specially prepared three die set. Since the most popular machines do not make use of an expander die, it has been eliminated in the new “Pro Series” sets. The sizing die is the extraordinary Redding Titanium Carbide, complete with a decapping unit. A superior crimp can be accomplished if it is done in a separate operation from the bullet seating. For this reason the “Pro Series” bullet seating die is designed for bullet seating only, with no crimping feature. Our Profile Crimp die is supplied for the final crimping.
For cartridges that headspace on the case mouth, a Taper Crimp die is substituted. All dies in the set have a special large radius at the mouth for easy case entry, a necessary feature for progressive machines. Kit contains a Titanium Carbide Sizing Die, Competition Seating Dia with micrometer adjustments, and a crimp die.
Big Book Catalog, Issue:68, Page:535
Sinclair, Issue:5B, Page:042