What specific calibres is the Redding 73185 .185-inch neck sizing bushing designed for?

The Redding 73185 bushing is engineered specifically for sub-calibre reloaders working with .17 calibre cartridges, such as the .17 Remington, .17 Hornet, and .17 Fireball. With an exact inside diameter of 0.185 inches, it is the smallest standard bushing in the Redding line, allowing you to achieve precise neck tension based on your specific brass wall thickness.

Which reloading dies are compatible with this 1/2-inch outer diameter steel bushing?

This bushing features a standard 1/2-inch (0.500") outer diameter and a 3/8-inch height, making it fully compatible with all Redding Type S Bushing Sizing Dies (both Full Length and Neck Bushing variants), Redding Competition Bushing Neck Sizing Dies, and compatible Wilson-style neck sizing hand dies.

Do I need to use case neck lubrication with this heat-treated steel version?

Yes, Redding explicitly recommends applying case neck lubrication when using their heat-treated steel bushings to ensure smooth operation and prevent brass scuffing. If you prefer a lower-friction alternative that reduces sizing effort further, Redding also manufactures a Titanium Nitride version under model number 76185.

How do I determine if the 0.185-inch size is correct for my loaded ammunition?

As a general guideline, Redding recommends selecting a bushing diameter that is 0.001" to 0.002" smaller than the outside diameter of your fully loaded cartridge neck. For calibres larger than .17 such as .20 or .22, you will need to step up to a larger bushing diameter within the 73XXX series.

What is the expected durability of this bushing under regular reloading press use?

The bushing is precision-machined from high-grade steel, heat-treated, and features a hand-polished internal sizing surface with a surface hardness rating of Rockwell C 60-62. This high hardness level ensures exceptional resistance to standard brass wear and maintains precise dimensions over thousands of reloading cycles.

Neck Sizing Bushing - Redding 73185

The Redding .185 Heat-Treated Steel Neck Sizing Bushing (Model: 73185) is a precision reloading component engineered to give handloaders exact control over case neck diameter and neck tension. By sizing the exterior neck dimension in a single step without an expander ball, it prevents overworking the brass and extends case life. Machined from high-grade steel and heat-treated to a surface hardness of Rockwell C 60–62, this bushing features a hand-polished internal diameter to minimise sizing friction and brass drag during the reloading press stroke.

Key Features

Precise Neck Tension: Sizes case necks to an exact 0.185-inch inside diameter, eliminating the need to pull an expander button through the neck in Redding Type S dies.
Durable Surface Finish: Heat-treated steel construction achieves a surface hardness of Rockwell C 60–62 with a hand-polished interior to resist wear under standard press pressure.
Standardised Sizing Envelope: Features a standard 1/2-inch (0.500") outside diameter and 3/8-inch (0.375") height for universal fit across compatible bushing die systems.
Die Compatibility: Freely interchanges across all Redding Type S Full Length and Neck Bushing Dies, Redding Competition Bushing Neck Sizing Dies, and compatible Wilson-style neck sizing hand dies.
Reduced Brass Fatigue: Focuses sizing effort strictly on the neck area, preventing unnecessary brass working and prolonging cartridge case longevity.

Specifications

Inside Diameter (Sizing Size): 0.185 inches
Outside Diameter (O.D.): 1/2 inch (0.500")
Length / Height: 3/8 inch (0.375")
Material: Heat-treated steel, hand-polished interior
Hardness Rating: Rockwell C 60–62
Manufacturer Model Number: 73185

Who is the Redding .185 Heat-Treated Steel Neck Sizing Bushing for?

Precision rifle benchrest competitors loading .17 calibre cartridges — provides an exact 0.185-inch inside diameter to fine-tune bullet release consistency and neck tension with Rockwell C 60–62 hardened steel durability.
Small-calibre varmint hunters handloading .17 Remington, .17 Hornet, or .17 Fireball — maintains strict neck dimensions using a compact 3/8-inch height and 1/2-inch outer diameter steel neck sizing bushing to prolong brass life across high-volume sub-calibre reloading cycles.

Less suitable for: Handloaders working with cartridge necks measuring over 0.185 inches (such as .20, .22, 6mm, or larger calibres up to .338), who require larger-diameter neck sizing bushings within the 1/2-inch outer diameter sizing series.

SKU	RD41744LP
Model #	73185
Brand	Redding
Shipping Weight	1.0000kg

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Redding 73185 Steel Neck Sizing Bushing 185 Calibre

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