Rock Chuck Bullet Swage
Rock Chuck Bullet Swage (later abbreviated RCBS) is a handloading equipment manufacturer operating in Oroville, California. The company originated during the sporting ammunition shortage caused by World War II, became a widely recognized manufacturer of handloading equipment, and has subsequently been purchased by Hodgdon Powder Company. The name came from the rock chuck variety of varmint found in the Oroville foothills.