RCBS Expander-Decapping Rod Assembly with Expander Ball
303275223
This is a factory replacement expander-decapping rod assembly for RCBS sizing dies, the part that does two jobs in a single stroke as you resize fired brass. The decapping pin at the tip punches the spent primer out through the flash hole, while the expander ball, mounted higher up the rod, sets the final neck inside diameter as the case is drawn back off the die. It is the natural fix for a bent rod, a broken or lost decapping pin, or an expander ball that has worn out of tolerance, letting you get a die back in service rather than replacing the whole set. The rod is machined to keep the ball concentric with the case, which matters for consistent neck tension and straight-seated bullets in stalking and target loads alike. Like all RCBS die parts, it is calibre-specific, so order the assembly that matches the cartridge your sizing die is set up for. A sensible spare to keep on the bench so a damaged component never cuts a reloading session short.
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