The Redding .245 Heat-Treated Steel Neck Sizing Bushing (MPN: 73245) provides precise control over cartridge case neck diameter and bullet tension. Engineered for handloaders seeking custom neck tension without overworking their brass, this non-powered reloading component fits all Redding Type S Neck Sizing Dies, Type S Full-Length Sizing Dies, Competition Bushing Neck Sizing Dies, and compatible Wilson-style hand dies. By resizing case necks to an exact inside diameter, it eliminates the need for an expander ball, reducing case stretching, neck fatigue, and runout across repeated firings.

Key Features

• Precise Tension Control: Calibrated with a precise 0.245-inch internal sizing diameter to set consistent neck tension for specific brass wall thicknesses.
• Hardened Steel Construction: Heat-treated to a hardness of approximately Rockwell C 60–62 (Rc 60–62) for wear resistance and dimensional stability during continuous sizing.
• Hand-Polished Interior: Features a hand-polished inner surface that reduces sizing effort and friction when properly lubricated.
• Standard Die Integration: Machined to an industry-standard 1/2 in. Outside Diameter by 3/8 in. Length (0.500" OD × 0.375" L) for universal interchangeability across Redding bushing-style dies.

Specifications

• Manufacturer Part Number (MPN): 73245
• Inside Sizing Diameter: 0.245 inches
• External Dimensions: 1/2 in. Outside Diameter × 3/8 in. Length (0.500" OD × 0.375" L)
• Material & Hardness: Heat-treated steel, Rockwell C 60–62
• Internal Finish: Hand-polished
• Die Compatibility: Redding Type S Bushing Full-Length Dies, Type S Neck Sizing Dies, Competition Bushing Neck Sizing Dies, Wilson-style hand dies
• Lubrication Requirement: Case neck lubrication required during sizing

Who is the Redding .245 Heat-Treated Steel Neck Sizing Bushing for?

• Precision long-range competition reloaders — controls bullet release consistency by sizing case necks to an exact 0.245-inch inside diameter using an Rc 60–62 hardened steel surface that maintains sizing consistency over high round counts.
• Benchrest shooters — minimizes neck runout and brass fatigue through a hand-polished steel neck sizing bushing measuring 0.500" OD × 0.375" L, eliminating standard expander ball drag.
• Varmint hunters preparing custom brass — sizes .22-calibre brass (such as .223 Remington or .22-250) to a uniform 0.245-inch diameter across large production batches using an industry-standard 1/2-inch OD die setup.

Less suitable for: Handloaders sizing brass without case neck lubrication, where a Titanium Nitride (TiN) coated bushing serves better, or for forming operations where neck reduction exceeds 0.004 inches in a single pass, which requires stepped intermediate bushings to prevent shoulder collapse.