Can I use the Redding 81127 Neck Sizing Die for brass fired in my semi-automatic 264 Win Mag rifle?

No, this die is built exclusively for bolt-action rifles. Manufacturer guidance states that neck-sized brass must only be fired in the exact chamber it was fire-formed in, and semi-automatic, lever-action, or pump-action firearms require a Full Length Sizing Die to guarantee reliable feeding and smooth cycling.

What shellholder do I need to use with the Redding 264 Win Mag Neck Sizing Die on my reloading press?

This die features an industry-standard 7/8"-14 thread that fits all common Australian-market single-stage and progressive presses. You will need to pair it with a Redding #6 Standard Shellholder (Part #11006) or the Redding Competition Shellholder #11606, which are sold separately.

How often will I need to perform full-length sizing or shoulder bumping when using this neck sizing die?

While neck-sizing minimises brass work-hardening and extends case life by leaving the body and shoulder unaltered, high-pressure firings will eventually cause the brass to expand. After approximately 3 to 5 reload cycles, cases typically require shoulder bumping and body sizing to ensure they still chamber smoothly in your rifle.

Neck Sizing Die - Redding 81127

The Redding .264 Winchester Magnum Neck Sizing Die (MPN: 81127) is a Series B conventional reloading die engineered to size and decap the case neck of .264 Win Mag brass while leaving the fire-formed body and shoulder unaltered. Machined with standard 7/8"-14 threading, this mechanical die operates on standard single-stage and progressive reloading presses. By restricting sizing strictly to the neck, it eliminates unnecessary work-hardening of the case body, significantly extending the working life of belted magnum cartridge brass and preserving custom fire-formed dimensions for consistent chamber fit.

Key Features

Neck-Only Resizing: Sizes the case neck and decaps spent primers while keeping the cartridge body and shoulder fire-formed to the rifle's specific chamber dimensions.
Standard Thread Compatibility: Built with an industry-standard 7/8"-14 thread to fit standard Australian-market reloading presses.
Integrated Decapping Assembly: Includes the standard decapping rod assembly (#34263) fitted with an expander button (#39263) and decapping pin to size 0.264" diameter bullet necks uniformly.
Extended Case Life: Avoids repeated full-length case body contraction, reducing brass fatigue on magnum cartridge cases.

Product Specifications

Manufacturer Part Number (MPN): 81127
Die Category: Series B – Conventional Neck Sizing Die
Calibre Compatibility: .264 Winchester Magnum (0.264" bullet diameter)
Thread Interface: 7/8"-14 thread
Required Shellholder: Redding #6 Standard Shellholder (Part #11006) or Competition Shellholder #11606 (sold separately)
Packaged Weight: Approximately 250–350 g (exact unboxed product weight not specified by manufacturer)
Power Requirements: None (manual mechanical reloading tool)

Who is the Redding 264 Win Mag Neck Sizing Die for?

Precision target shooters shooting .264 Win Mag bolt-action rifles — sizes and decaps 0.264" bullet diameter case necks on a standard 7/8"-14 thread press without altering the fire-formed brass body, maintaining exact chamber concentricity for repeatable long-range accuracy.
Benchrest shooters performing tailored load development for a single firearm — eliminates work-hardening on the cartridge body of .264 Winchester Magnum brass using a matching Redding #6 shellholder setup, maximising case reuse across dedicated load development cycles.

Less suitable for: Shooters using semi-automatic, lever-action, or pump-action firearms, as neck-sized brass lacks the uniform body reduction required for reliable cycling; these action types require a full-length sizing die. Additionally, because cases naturally expand after 3 to 5 high-pressure firings until bolt closure becomes stiff, users must periodically use a full-length sizing die or a dedicated body die to bump the shoulder back to standard dimensions.

SKU	RD41900LP
Model #	81127
Brand	Redding
Shipping Weight	1.0000kg

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Redding 81127 Neck Sizing Die 264 Win Mag 7/8-14 Thread

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