Can I use the Redding 81139 Neck Sizing Die for semi-automatic or lever-action 7mm-08 Remington rifles?

No, neck sizing dies like the Redding 81139 are strictly recommended for bolt-action rifles where ammunition is fired in the exact same chamber. Cases fired in semi-automatic, pump-action, or lever-action firearms require full-length sizing or a small base die to ensure reliable feeding and chambering in the field.

What shellholder do I need to use with the Redding 81139 die on my Australian reloading press?

The Redding 81139 utilizes an industry-standard 7/8"-14 thread and requires a standard Redding Shellholder #1 (Part #11001) or a Redding Competition Shellholder #11601. It is fully compatible with any standard single-station reloading press commonly used by handloaders across Australia.

How often will I need to full-length size or bump the shoulder back when using this neck sizing die?

Because the Redding 81139 only sizes the neck and leaves the body and shoulder untouched, the brass will gradually fire-form to your chamber. After typically 3 to 5 firing cycles, brass bodies expand and shoulders migrate forward, at which point you will need to pair this die with a Redding Body Die (75139) to bump the shoulder back for smooth bolt closure.

Does the Redding 81139 die require any electrical compliance certification for use in Australia?

No, electrical compliance or SAA/RCM certifications are not applicable to this product. The Redding 81139 is a purely mechanical, non-powered reloading tool that operates manually on your workbench without requiring mains power.

7mm-08 Neck Sizing Die - Redding 81139

The Redding Neck Sizing Die for 7mm-08 Remington (MPN: 81139) is a dedicated reloading die designed to resize only the neck of fire-formed cartridge cases. Machined from heat-treated, case-hardened alloy steel, it decaps spent primers and expands the case neck to standard internal dimensions without altering the case body or shoulder geometry. By preserving the fire-formed dimensions of the brass to match a specific rifle chamber, this mechanical die minimises work-hardening, extends case life, and improves shot-to-shot consistency.

Dedicated Neck Sizing: Resizes only the neck of 7mm-08 Remington cases (.284 in / 7mm bullet diameter), leaving fire-formed case bodies and shoulders untouched.
Internal Assembly: Fitted with a complete decapping rod assembly (#23283), decapping pin (#01060), and size expander button (#40283) for single-step depriming and neck expansion.
Extended Brass Longevity: Eliminates excessive full-length body sizing to reduce brass fatigue and prolong usable case life.
Standard Press Mounting: Features industry-standard 7/8"-14 threads for compatibility with single-station and turret reloading presses.
Shellholder Compatibility: Engineered for use with standard Redding Shellholder #1 (#11001) or Competition Shellholder #11601.

Specifications

Brand: Redding Reloading Equipment
Manufacturer Part Number (MPN): 81139
Calibre Compatibility: 7mm-08 Remington
Bullet Diameter: .284 in / 7mm
Thread Standard: 7/8"-14
Material: Precision-machined, hand-polished, heat-treated alloy steel
Operating Type: Manual mechanical reloading tool (non-powered)

Who is the Redding 81139 Neck Sizing Die for?

7mm-08 Remington bolt-action precision shooters — provides concentric neck sizing and depriming on standard 7/8"-14 presses without altering fire-formed body dimensions, maximising alignment and accuracy in 7mm-08 Remington chambers.
Handloaders reloading for a single specific rifle chamber — eliminates unnecessary brass working on 7mm-08 Remington cases by sizing only the neck area, extending brass case life across repeated firing cycles in the same firearm.

Less suitable for: semi-automatic, pump-action, or lever-action rifles, as well as brass fired across multiple firearms or cases that have expanded after 3 to 5 firing cycles; these conditions require a full-length sizing die or a dedicated body die to ensure reliable chambering and extraction.

SKU	RD102325LP
Model #	81139
Brand	Redding
Shipping Weight	0.2000kg

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Redding 81139 Neck Sizing Die 7mm-08 Remington Reloading Tool

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