The Premium Full Length Die Set was introduced in 2015. This mated the standard Micrometer Bullet Seating Stem to the standard Redding Seater Die.
This allows the reloader to have more precise control of the seating depth of each round. The micrometer is adjustable in increments of 0.001. The standard full length sizing die has had it's steel expander button replaced with a carbide expander button.This eases stress placed on the case neck during sizing operations. The sets come in a distinctive black box.