RCBS Expander/Decapping Assembly Features The RCBS Expander/Decapping Assembly is precision machined to ensure concentricity so cases are deprimed and necks expanded consistently with every cycle through the sizing die. Its ultra hard carbide expander button resists wear far better than standard steel buttons maintaining smooth consistent case neck expansion over thousands of cycles. The adjustable positioning sleeve lets reloaders set the exact depth of expansion needed for their particular cartridge and bullet combination. Using genuine RCBS factory replacement parts ensures a perfect fit and proper function within existing RCBS reloading dies. This assembly is built from an expander rod expander ball and decapping pin the core components responsible for removing spent primers and shaping the case neck in a single pass through the die. Reloaders working with bottleneck cartridges rely on this kind of expander to maintain proper bullet tension and consistent seating depth across a batch of brass. Keeping a spare assembly in a reloading kit is good practice since a damaged pin or expander ball can otherwise bring a reloading session to a halt. This RCBS Expander/Decapping Assembly is available for sale at GrabAGun for reloaders who want to keep their sizing dies running without unplanned downtime. RCBS Expander/Decapping Assembly Specifications Manufacturer: RCBS Model: Expander/Decapping Assembly Type: Reloading Accessory Caliber: .310 Cal Includes: Expander Rod Expander Ball Decapping Pin Available At: GrabAGun