What dies are compatible with the Redding 73331 .331 Heat-Treated Steel Neck Sizing Bushing?

This bushing features standard dimensions of a 1/2-inch outer diameter and a 3/8-inch length, making it fully compatible with all Redding Bushing-Style Sizing Dies including Type S Full, Type S Neck, and Competition Neck Sizing dies. It is also interchangeable with other standard 1/2-inch O.D. bushing platforms such as L.E. Wilson dies.

Do I need to use case lube with this standard steel bushing?

Yes, case lubrication is strictly required before sizing because this model is made of standard heat-treated carbon steel rather than a low-friction coating. If you prefer to size clean brass without traditional liquid or wax lubricants, you would instead need to look at a Titanium Nitride coated alternative.

What is the maximum single-step neck reduction recommended for the Redding 73331?

Redding recommends reducing the case neck diameter by no more than .004 to .005 inches in a single sizing step using this bushing. Attempting a larger reduction from fire-formed dimensions in one pass can result in case neck buckling, so multi-step reductions or an intermediate bushing like the Redding 73333 should be used for larger adjustments.

Does this mechanical reloading tool require any electrical certifications for use in Australia?

No electrical compliance or SAA/RCM certifications are required for the Redding 73331. It is a purely mechanical reloading tool with no electrical components, meaning it does not plug into 240V mains power and is ready for immediate bench use across Australian reloading rooms.

Neck Sizing Bushing - Redding 73331

The Redding .331 Heat-Treated Steel Neck Sizing Bushing (MPN: 73331) is a precision metallic cartridge reloading component designed to resize case necks to an exact outside diameter of 0.331 inches. Built with industry-standard external dimensions of 1/2-inch outer diameter by 3/8-inch length, this bushing freely interchanges across all Redding Bushing-Style Sizing Dies—including Type S Neck, Type S Full Length, and Competition Neck Sizing Dies—as well as standard 1/2-inch O.D. bushing platforms like L.E. Wilson dies. It allows handloaders to establish consistent neck tension without excessively working the brass, enhancing concentricity and extending cartridge case life.

Key Features

Precision Neck Tension: Sizes the cartridge neck exterior to a precise 0.331-inch diameter, preventing brass overworking and maintaining tighter bullet grip consistency.
Hardened Steel Construction: Manufactured from heat-treated carbon steel hardened to approximately Rc 60–62 for high wear resistance over extended reloading cycles.
Hand-Polished Interior: Features a hand-polished inner bore surface to reduce sizing friction and prevent brass galling or scratching during the press stroke.
Clear Size Identification: Stamped with a ".331" size marking for immediate identification and sorting on the reloading bench.

Product Specifications

Internal Sizing Diameter: 0.331 inches (0.331″)
Outer Diameter: 1/2 inch (0.500″)
Length: 3/8 inch (0.375″)
Material: Heat-treated carbon steel
Hardness Rating: Rc 60–62 (Rockwell C scale)
Packaged Weight: Approximately 0.1 lbs (45 g)
Die Compatibility: Redding Type S Neck, Type S Full Length, and Competition Bushing Dies; 1/2″ O.D. L.E. Wilson dies

Who is the Redding .331 Heat-Treated Steel Neck Sizing Bushing for?

Precision .30-Calibre Handloaders — requiring an exact 0.331-inch sizing diameter to achieve 0.001-inch to 0.002-inch bullet tension on .30-06 Springfield, .308 Winchester, or .300 Win Mag brass measuring .332 to .333 inches at the neck when loaded.
Long-Range Target Competitors and Benchrest Shooters — utilizing Redding standard 1/2-inch outer diameter and 3/8-inch length dies with heat-treated Rc 60–62 steel bushings to maintain consistent neck concentricity across high-volume match preparation.

Less suitable for: Handloaders needing to reduce fired case neck diameters by more than 0.004 to 0.005 inches in a single stroke (which requires multi-step reduction bushings or a dedicated full-length sizing die to prevent neck buckling), or reloaders wanting to size without case lubrication, who require a Titanium Nitride (TiN) coated neck sizing bushing instead.

SKU	RD41777LP
Model #	73331
Brand	Redding
Shipping Weight	1.0000kg

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Redding 73331 Steel Neck Sizing Bushing 0.331 Inch

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