Can I use the Redding 81259 neck sizing die if I shoot my 6.8mm Remington SPC out of a semi-automatic AR-15?

No, neck sizing dies like the Redding 81259 are specifically intended for bolt-action rifles where brass is fired through a single dedicated chamber. Semi-automatic, pump, or lever-action rifles require full-length resizing dies to ensure reliable feeding and chambering under all operating conditions.

What press threads and shellholders are required to set up the Redding 81259 die on my reloading bench?

This die features an industry-standard 7/8"-14 thread, making it fully compatible with standard single-stage and turret reloading presses available in Australia. You will also need a Redding Shellholder #5 to properly secure and index your 6.8mm Remington SPC cartridge cases.

Do I need to worry about any electrical or Australian compliance certifications for this tool?

No, because the Redding 81259 is a purely mechanical hand-reloading tool, electrical regulations such as 240V mains power compatibility, Australian plugs, or SAA/RCM certifications do not apply. It is built for straightforward manual operation in your workshop.

How does using this neck sizing die affect the lifespan of my 6.8mm SPC brass compared to standard full-length sizing?

By sizing only the case neck and leaving the body and shoulder fire-formed to your specific rifle chamber, the Redding 81259 eliminates excessive working of the brass walls. This significantly reduces stress on the cartridge case and substantially extends your brass life over multiple reloading cycles.

6.8mm Neck Sizing Die - Redding 81259

The Redding 6.8mm Remington SPC Neck Sizing Die (MPN: 81259) is a precision reloading tool engineered to resize only the neck area of fire-formed 6.8mm Remington SPC cartridge cases. By leaving the case body and shoulder dimensions fire-formed to a specific rifle's chamber, this die maintains a custom fit while eliminating unnecessary working of the brass walls, which extends case life and enhances concentricity. Built from heat-treated steel, the die features standard 7/8"-14 mounting threads and integrates a decapping rod assembly, expander size button, and decapping pin to decap spent primers and set internal neck tension simultaneously.

Key Features

Targeted Neck Sizing: Resizes exclusively the neck portion of the case, preserving the fire-formed body and shoulder dimensions to fit a dedicated firearm chamber.
Simultaneous Decapping and Expanding: Features a decapping rod assembly (#22276) and an expander button (#40276) that decaps fired primers while expanding the inside neck diameter in a single stroke.
Extended Brass Life: Minimises brass fatigue and prevents over-working of the case walls and shoulder area compared to full-length resizing operations.
Infinitely Adjustable Depth: Threaded die body and steel lock ring (#01016) allow precise depth adjustment to size either the full neck or a specific portion of the neck length.
Industry-Standard Mounting: Features standard 7/8"-14 press threads for compatibility with single-stage and turret reloading presses.

Specifications

Calibre: 6.8mm Remington SPC (0.277" bullet diameter)
Mounting Thread: 7/8"-14 industry standard
Required Shellholder: Redding Shellholder #5 (sold separately)
Material: Heat-treated alloy steel
Included Components: Sizing die body, decapping rod assembly (#22276), expander size button (#40276), decapping pin (#01060), and steel lock ring (#01016)
Operation: Mechanical hand-reloading (non-powered)

Who is the Redding 6.8mm Remington SPC Neck Sizing Die for?

Bolt-action target shooters and hunters firing through a single chamber — requires a 6.8mm SPC neck sizing die built with standard 7/8"-14 threads to resize only the neck portion of fire-formed brass, maximising cartridge life and maintaining custom chamber concentricity across multiple firings.

Less suitable for: Reloaders feeding semi-automatic, pump-action, or lever-action rifles, where brass requires a full-length resizing die to reset outer body and shoulder dimensions for reliable feeding and chambering.

SKU	RD102822LP
Model #	81259
Brand	Redding
Shipping Weight	0.1000kg

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Redding 81259 Neck Sizing Die 6.8mm Remington Spc 7/8"-14 Thread

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