The Redding Type S Bushing Neck Sizing Die (Model 71163) is a precision reloading die designed to resize the neck of fire-formed .338 Winchester Magnum cartridge brass. Built to standard 7/8"-14 reloading press threading, this die uses interchangeable sizing bushings (sold separately in .001" increments) to allow exact control over neck tension without overworking case brass. The freely self-centering bushing aligns naturally with the case neck during the press stroke to minimise runout and preserve concentricity. Supplied with both an adjustable decapping pin retainer and a standard expander button, it accommodates both neck-turned brass and commercial un-turned cases.

Key Features

• Interchangeable Bushing System: Utilises Redding bushings (available in .001" increments) to precisely set neck tension on .338 Winchester Magnum cases.
• Self-Centering Design: The sizing bushing freely floats within the die body to maintain optimal cartridge neck-to-body concentricity.
• Dual Sizing Modes: Includes a decapping pin retainer for sizing turned brass without an expander ball, as well as a traditional size button for standard factory brass.
• Adjustable Sizing Depth: The decapping and bushing assembly adjusts vertically to resize the full length or a partial length of the case neck.

Specifications

• Calibre: .338 Winchester Magnum (0.338 in bullet diameter)
• Thread Standard: 7/8"-14 standard press thread
• Shellholder Compatibility: Redding Shellholder #6 (Part #11006) or Competition Shellholder #11606
• Operating Mechanism: Manual mechanical reloading die
• Packaged Weight: Approximately 0.4–0.5 kg

Who is the Redding 338 Win Mag Type S - Neck Die for?

• Precision long-range shooters loading .338 Winchester Magnum — Requires exact neck tension adjustment on 0.338 in diameter projectiles using interchangeable bushings stepped in .001" increments within a standard 7/8"-14 threaded 338 Win Mag neck die to minimise runout.
• Reloaders seeking to extend brass life for bolt-action .338 Winchester Magnum rifles — Resizes only the neck of fire-formed .338 Winchester Magnum cases held in a Redding Shellholder #6, eliminating unnecessary work-hardening of the case body and shoulder between firings.

Less suitable for: Reloaders handling brass that has work-hardened, expanded beyond chamber clearance, or started causing stiff bolt closure; a full-length sizing die or dedicated body die is required instead to bump the shoulder and resize the case body.