The Redding .189 Heat-Treated Steel Neck Sizing Bushing is a precision reloading component engineered to regulate case neck tension and maintain brass concentricity. Designed to fit standard bushing dies, it sizes the exterior neck diameter of brass cases without the use of an internal expander ball, reducing work-hardening to extend case life. The bushing floats freely within compatible die bodies to self-centre during the reloading cycle, ensuring uniform neck alignment for sub-calibre ammunition.

Key Features

• Expander-Free Neck Sizing: Eliminates the friction and runout caused by dragging an expander ball through the case neck, minimising brass fatigue.
• Precision Hardened Steel: Manufactured from high-grade steel heat-treated to approximately Rockwell Rc 60–62 for long-term wear resistance.
• Hand-Polished Interior: Features a hand-polished internal surface designed to minimise sizing effort and resistance when used with case neck lubricant.
• Self-Centering Fit: Freely floats inside die bodies to maintain concentricity during sizing passes.
• Broad Die Compatibility: Fits all Redding Type S Bushing Full Length Dies, Type S Neck Sizing Dies, Competition Neck Sizing Dies, and standard Wilson-style neck sizing dies.

Product Specifications

• Internal Diameter (ID): 0.189 inches (stamped with size ID)
• Outer Diameter (O.D.): 1/2 inch (0.500 inches)
• Length: 3/8 inch (0.375 inches)
• Material Hardness: Approximately Rockwell Rc 60–62
• Weight: Approximately 10–15 grams
• Operation: Non-powered manual reloading component

Who is the Redding .189 Heat-Treated Steel Neck Sizing Bushing for?

• Precision handloaders loading sub-calibre .17 cartridges — Requires a 0.189-inch internal diameter neck sizing bushing to set precise 0.001-inch to 0.002-inch bullet tension on brass measuring 0.190 to 0.191 inches across the loaded neck.
• Benchrest target shooters — Relies on heat-treated steel hardened to Rockwell Rc 60–62 and a hand-polished 0.189-inch interior sizing surface to eliminate expander-ball runout for maximum shot-to-shot consistency.
• Varmint hunters — Uses standard 1/2-inch outer diameter bushing-style dies to produce uniform ammunition for small feral pest control using high-velocity .17-calibre platforms.

Less suitable for: Handloaders sizing cartridges with loaded neck diameters outside the 0.190-inch to 0.191-inch range (who require alternative diameter bushings sized in 0.001-inch increments), or reloaders who prefer sizing brass necks without lubrication (who should step up to a Titanium Nitride coated bushing).