Primer Pocket Uniformers are manufactured with carbide cutters, and serve to true the primer pocket wall and bottom. RCBS: PRECISIONEERED RELOADING. RCBS has dedicated itself to the craft of handloading ammunition since it was founded in 1943. RCBS is the leading manufacturer of reloading equipment for rifles and pistols. Reloading is an exact process with tight tolerances. It requires precision and skill to be done correctly. Thats why RCBS makes state-of-the-art products all are backed by RCBSs industry-leading reputation.