Will the Redding 25 Wssm Neck Sizing Die fit my standard Australian reloading press?

Yes, this die features the industry-standard 7/8"-14 threads per inch (TPI), making it fully compatible with standard single-stage and turret reloading presses commonly used on Australian reloading benches, including presses from Redding, RCBS, Hornady, and Lee.

Can I use neck-sized brass from this die in multiple .25 WSSM rifles?

No, neck sizing only resizes the neck of fire-formed brass while leaving the body and shoulder untouched. This means the brass is fire-formed exclusively to one specific chamber and must not be shared across different rifles of the same calibre to ensure safe and reliable chambering.

How do I know when to stop neck sizing and switch to a full-length sizing or body die?

After approximately 3 to 5 firing cycles, brass cases will naturally expand and shoulders will creep forward through repeated use. When you begin to experience stiff bolt closure in your bolt-action rifle, you must transition to a full-length sizing die or a Redding Body Die to bump the shoulder back.

25 WSSM Neck Die - Redding 81263R

The Redding .25 Winchester Super Short Magnum (.25 WSSM) Neck Sizing Die is a precision reloading tool engineered to resize only the neck of fire-formed cartridge cases. Machined from heat-treated alloy steel with polished internal surfaces, this die leaves the case body and shoulder dimensions undisturbed. This process reduces work-hardening of the brass, extends cartridge case life, and maintains the custom fire-formed fit of the brass to a specific bolt-action rifle chamber for enhanced shot-to-shot consistency.

Key Features

Neck-Only Sizing: Resizes the neck of .25 WSSM cases without contacting the body or shoulder, maintaining custom chamber dimensions and prolonging brass working life.
Integrated Decapping and Expander Assembly: Includes an internal decapping rod and expander ball that unseats spent primers and sets uniform internal neck tension on the press upstroke.
Standard Thread Mounting: Features industry-standard 7/8"-14 TPI threads to ensure compatibility with standard reloading presses.
Durable Construction: Built from heat-treated alloy steel with polished internal surfaces to minimise friction during the sizing stroke.

Specifications

Calibre Compatibility: .25 Winchester Super Short Magnum (.25 WSSM)
Die Type: Neck Sizing Die
Thread Interface: 7/8"-14 TPI (threads per inch)
Material: Heat-treated alloy steel
Approximate Weight: 200–300 g (uncased)
Operation: Manual / mechanical press-mounted

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

Bolt-action .25 WSSM rifle reloaders — seeking extended brass longevity and reduced work-hardening by sizing only the case neck of .25 Winchester Super Short Magnum cartridges using a neck sizing die threaded to industry-standard 7/8"-14 TPI.
Precision handloaders — maintaining the exact fire-formed body and shoulder dimensions of .25 WSSM brass for tighter shot groupings in a single, dedicated bolt-action chamber using standard 7/8"-14 TPI press setups.

Less suitable for: Reloaders feeding semi-automatic, pump-action, or lever-action firearms, cartridges fired across multiple different rifles of the same calibre, or cases experiencing stiff bolt closure after 3 to 5 firing cycles; these conditions require a full-length sizing die or a dedicated body die to return the case body and shoulder to factory dimensions.

SKU	RD41911LP
Model #	81263R
Brand	Redding
Shipping Weight	1.0000kg

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Redding 81263r Neck Sizing Die 25 Wssm Steel

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