The Redding Neck Sizing Die for .25 Winchester Super Short Magnum (.25 WSSM) resizes only the case neck while leaving the cartridge body and shoulder fire-formed to a specific rifle's chamber. Built to minimise cold working of the brass case walls, this die helps extend the working life of cartridge cases and improves bullet-to-bore concentricity. It incorporates an internal decapping assembly with an expander ball to deprime spent primers and set proper neck tension in a single press stroke.

Key Features

• Neck-Only Sizing: Resizes exclusively the neck portion of .25 WSSM brass, preserving the fire-formed chamber dimensions of the cartridge body.
• Integrated Decapping Assembly: Includes a decapping rod assembly and expander button to deprime and set internal neck dimensions simultaneously.
• Standard Press Interface: Machined with industry-standard 7/8"-14 threads for compatibility with standard single-stage and turret reloading presses.
• Extended Brass Life: Reduces working stress on the case body and shoulder, increasing the lifespan of scarce .25 WSSM cases.

Specifications

• Brand: Redding Reloading Equipment
• Model Number: 81263
• Calibre Compatibility: .25 WSSM (.25 Winchester Super Short Magnum)
• Thread Pitch: 7/8"-14 standard thread
• Required Shellholder: Standard Shellholder #6 (sold separately)
• Included Parts: Die body, decapping rod assembly, and neck expander button
• Power Requirements: None (manual mechanical operation)

Who is the Redding .25 WSSM Neck Sizing Die for?

• Bolt-Action Precision Target Shooters — Requires precise chamber alignment for .25 WSSM cartridge cases, utilizing standard 7/8"-14 thread pitch press compatibility to form uniform neck tension without altering the fire-formed case body.
• Hunters Reloading for a Dedicated Rifle — Extends brass service life across repeated firings by working only the neck area on .25 WSSM cases dedicated to a single bolt-action firearm.

Less suitable for: Reloaders seeking ammunition compatibility across multiple firearms, non-bolt action mechanisms, or cases showing bolt-closing resistance after 3 to 5 firing cycles; these scenarios require a full-length sizing die or a dedicated body die to set back the shoulder and restore factory body dimensions.