Smooth, Precision Neck Sizing for Perfect Reloads

Even the most carefully crafted reloading dies require occasional maintenance. A broken or worn expander ball can instantly halt your reloading session. The Hornady Elliptical Expander Ball is a high-quality, factory-original replacement part designed to keep your Hornady Custom Grade and Match Grade New Dimension sizing dies functioning identically to the day they were taken out of the box.

Unlike traditional, aggressive "round ball" expanders that can bind inside the case, Hornady’s exclusive elliptical design is engineered to provide significantly smoother neck sizing. This specialized shape drastically reduces friction as the expander is pulled back up through the brass, virtually eliminating case neck stretch and minimizing wear on your valuable brass. Furthermore, the elliptical profile is so smooth that it eliminates the need for a separate expander die when necking-up brass to the next caliber.

Designed specifically for bottleneck rifle cartridges, these expanders thread directly onto the decapping pin retainer on Hornady’s patented Zip Spindle™ assembly. They are precision-machined to be exactly .001" smaller than the corresponding bullet diameter, ensuring the perfect amount of neck tension for consistent bullet seating and optimal downrange accuracy.

• Elliptical Profile: Superior to standard round expanders, the smooth elliptical shape significantly reduces drag and friction, preventing case neck stretching and prolonging brass life.

• Consistent Neck Tension: Precision-machined to size case necks exactly .001" under bullet diameter, providing consistent, reliable neck tension for accurate bullet seating.

• Necking-Up Capability: The gradual, smooth taper allows you to easily neck-up brass to the next caliber without requiring a dedicated, separate expander die.

• Internal Threading: Threads securely into the Hornady Zip Spindle™, preventing the expander from ever pulling loose during heavy sizing sessions.

• Factory Replacement: A genuine Hornady OEM part, guaranteeing flawless compatibility with your existing Custom Grade or Match Grade dies.