The Redding Type S Bushing Neck Sizing Die is designed for precision reloaders working with the .300 Winchester Short Magnum (.300 WSM) cartridge. Engineered to maintain brass life and minimise runout, this die resizes only the case neck while leaving the fire-formed body and shoulder unchanged. It utilises freely floating, interchangeable bushings to deliver exact neck tension adjustments without overworking cartridge brass.

Key Features

• Interchangeable Bushing System: Employs self-centring bushings (available in 0.001-inch increments) that float within the die body to optimise concentricity and reduce bullet runout.
• Adjustable Sizing Depth: The decapping rod assembly adjusts vertically, allowing handloaders to size either the full length of the neck or a partial section.
• Dual Operation Modes: Can be configured with the standard expander ball button for commercial, unturned brass, or with the included decapping pin retainer for uniform, neck-turned cases to eliminate brass stretching.
• Standard Press Fit: Built with standard 7/8"-14 threads to mount directly into standard single-stage and progressive reloading presses.

Specifications

• Calibre: .300 Winchester Short Magnum (.300 WSM)
• Bullet Diameter Compatibility: 0.308-inch projectiles
• Press Thread Size: 7/8"-14
• Typical Bushing Size Range: 0.334" to 0.342" (bushings sold separately)
• Shellholder Compatibility: Redding Shellholder #6 or Competition Shellholder Set #6 (sold separately)
• Included Components: Die body, decapping rod assembly, standard expander button, and decapping pin retainer

Who is the Redding Type S Bushing Neck Die for?

• Precision handloaders and long-range hunters — sizing fire-formed brass for bolt-action rifles chambered in .300 Winchester Short Magnum (.300 WSM), this neck sizing die uses custom-selected bushings nominally spanning 0.334" to 0.342" to establish exact bullet-seating tension without working the case body.
• Benchrest and F-Class competitors — requiring minimal bullet runout, this die mounts into standard 7/8"-14 thread presses and employs a floating bushing system to align cartridge necks with the central axis of the case.

Less suitable for: Reloaders processing mixed range brass, loading for semi-automatic, lever-action, or pump-action rifles, or working with fire-formed cases that have expanded to cause heavy bolt-lift; these scenarios require a full-length resizing die or a dedicated body die to bump the shoulder and restore factory chamber dimensions.