Lee's RGB (Really Great Buy) provides Lee's excellent quality dies without all the extras of the PaceSetter series. RGB series consists of the Full Length Sizing Die, Dead Length Easy Adjust Bullet Seating Die, and Instructions. Full-length sizing is a must if you are reloading for more than one firearm or reloading cases previously fired in others' firearms. These dies produce factory-dimensioned ammo to reliably fit and feed in any gun. They are the first choice for semi-auto actions. Lee's tolerance is 50% less than the advertised amount of a popular and expensive brand. Lee guarantees these dies are better than any other brand.