The Redding .325 WSM Neck Sizing Die is a mechanical reloading tool engineered to decap spent primers and resize only the case neck of .325 Winchester Short Magnum (.325 WSM) cartridge brass. Precision-machined from heat-treated alloy steel with polished internal surfaces, this die leaves the fire-formed case body and shoulder dimensions completely intact. This preserves the exact internal chamber fit of the specific rifle it was fired in while minimising brass work-hardening. Built on standard 7/8"-14 threads, the assembly includes a complete decapping rod, expander ball (size button), decapping pin, and locking ring, fitting standard reloading presses.

Key Features

• Neck-Only Resizing: Resizes only the neck to hold .323" diameter bullets and deprimes spent primers without altering or setting back the cartridge shoulder or case body.
• Extended Brass Longevity: Eliminates unnecessary full-length body sizing and trimming, significantly reducing work-hardening to extend the working life of bottleneck brass.
• Fire-Formed Alignment: Maintains the custom shoulder angle and body taper produced by the rifle chamber during firing, improving cartridge concentricity and alignment.
• Precision Construction: Manufactured from heat-treated alloy steel with smooth, polished interior surfaces to minimise neck drag and brass wear.
• Upgradable Component Design: Fully compatible with factory replacement parts and optional carbide size buttons to reduce inside-neck friction.

Specifications

• Brand: Redding Reloading Equipment
• Manufacturer Part Number: 81202
• Calibre Compatibility: .325 Winchester Short Magnum (.325 WSM / 8mm WSM)
• Bullet Diameter: .323"
• Thread Interface: Standard 7/8"-14 thread
• Material: Heat-treated alloy steel
• Length: Approximately 10–12 cm
• Unit Weight: Approximately 230–300 g
• Power Requirements: None (manual reloading tool)
• Included Components: Neck sizing die body, decapping rod assembly, expander size button, decapping pin, locking ring

Who is the Redding 325 WSM Neck Sizing Die for?

• Bolt-action hunters: Requires a 325 WSM neck sizing die that preserves fire-formed cartridge brass specifically dedicated to a single bolt-action rifle chamber for hunting medium-to-large game with .323" diameter projectiles.
• Precision handloaders: Uses standard 7/8"-14 thread presses to process .325 Winchester Short Magnum brass without setting back the shoulder, reducing brass fatigue and work-hardening over multiple reloads.

Less suitable for: Autoloading, pump-action, lever-action, or break-action rifles, or for brass that has reached 3 to 6 firing cycles without body sizing; these applications require a full-length sizing die or dedicated body die to ensure reliable chambering and prevent bolt-close resistance.