What dies are compatible with the Redding 73306 0.306" Steel Neck Sizing Bushing?

This bushing freely interchanges across all Redding bushing-style dies including Type S Neck Sizing Dies, Type S Full Length Dies, and Competition Bushing Neck Sizing Dies, as well as standard Wilson-style dies. It features a standard 0.500" outer diameter and 0.375" height.

Do I need to lubricate cartridge case necks before using this heat-treated steel bushing?

Yes, standard heat-treated steel bushings require case neck lubrication prior to sizing to prevent brass galling or sticking in the die. If you prefer to size without case lube, you would need to look at Redding's Titanium Nitride-coated bushing alternatives instead.

Are there any legal restrictions or permits required to purchase this reloading accessory in Australia?

No firearms licensing or special permits are required to purchase or own the Redding 73306 bushing in any Australian state or territory. It is classified strictly as mechanical reloading tooling.

What is the recommended maximum reduction limit when using this bushing in a single pass?

Manufacturer guidelines recommend that if your required neck reduction exceeds approximately 0.004" to 0.005", you should size the case neck down in multiple steps. This prevents over-working the brass and avoids potential shoulder or neck deformation.

Neck Sizing Bushing - Redding 73306

The Redding .306 Heat-Treated Steel Neck Sizing Bushing (MPN: 73306) provides precise external sizing for cartridge case necks without over-working the brass. Machined from high-grade alloy steel and hardened to Rockwell C (Rc) 60–62, this bushing features a hand-polished interior surface to minimise sizing resistance and prevent excessive neck runout. It allows reloaders to achieve exact neck tension and eliminate standard expander balls, enhancing projectile concentricity and extending overall case life. Designed to industry-standard external dimensions of 0.500" outer diameter by 0.375" height, it freely interchanges across all Redding Type S Neck Sizing Dies, Type S Full Length Dies, Competition Bushing Neck Sizing Dies, and standard Wilson-style sizing dies.

Key Features

Precise Neck Tension Control: Accurately sizes case necks externally to a 0.306-inch inside diameter, maintaining consistent bullet grip without over-working brass.
Hardened Steel Construction: Heat-treated to a hardness of Rockwell C (Rc) 60–62 to resist wear across high-volume reloading sessions.
Hand-Polished Interior: Smooth internal surface finish reduces friction and drag during the sizing stroke.
Expander-Free Sizing: Eliminates the need for an expander ball when using properly prepped brass, minimising case neck runout.
Universal Die Compatibility: Built with a 1/2-inch (0.500") outer diameter and 3/8-inch (0.375") height to fit all Redding Type S, Competition Bushing, and Wilson-style dies.

Product Specifications

Product Name: Redding .306" Heat-Treated Steel Neck Sizing Bushing
Manufacturer Part Number (MPN): 73306
Inside Sizing Diameter: 0.306 inches
Outer Diameter: 0.500 inches (1/2")
Height: 0.375 inches (3/8")
Material: Heat-treated alloy steel
Surface Hardness: Rockwell C (Rc) 60–62
Die Compatibility: Redding Type S Neck Sizing Dies, Type S Full Length Dies, Competition Bushing Neck Dies, and Wilson-style dies

Who is the Redding .306 Heat-Treated Steel Neck Sizing Bushing for?

Precision rifle reloaders — seeking precise neck tension control for cartridges requiring an exact 0.306-inch sized neck diameter, utilising this steel neck sizing bushing within standard 0.500" outer diameter die pockets to avoid over-working brass.
Benchrest and F-Class competitors — requiring extreme projectile concentricity and minimal runout, relying on the hand-polished Rockwell C (Rc) 60–62 hardened steel neck sizing bushing to size cases consistently without using an expander ball.

Less suitable for: Reloaders seeking dry, lube-free neck sizing, as heat-treated steel requires case neck lubrication to prevent brass galling; these users should select a Titanium Nitride (TiN)-coated bushing. It is also unsuitable for neck reductions exceeding 0.004" to 0.005" in a single pass without using intermediate step-down bushings.

SKU	RD41772LP
Model #	73306
Brand	Redding
Shipping Weight	1.0000kg

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Redding 73306 Steel Neck Sizing Bushing 0.306 In

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