Will this die work with standard .260 Remington factory brass or only fire-formed Ackley Improved cases?

This Type S Full Length Die is specifically designed for the .260 Remington Ackley Improved with a 40° shoulder angle and cannot be used to resize standard .260 Remington or 30° AI cases. It is engineered to bump the shoulder back to minimum headspace dimensions on brass that has already been fire-formed in an Ackley Improved chamber.

What neck bushing size do I need to purchase separately for this die?

The practical neck bushing size envelope for this calibre typically ranges from 0.287" to 0.295", depending on your brass neck wall thickness and desired neck tension. Bushings are sold separately in 0.001" increments, and you should measure loaded rounds with a micrometer to calculate your exact bushing requirement.

Which shellholders are compatible with the Redding 77623 die on my reloading press?

This die features an industry-standard 7/8"-14 thread that fits all popular single-stage and turret reloading presses available in Australia. For proper operation, it requires either the Redding Standard Shellholder #1 or the Redding Competition Shellholder Set #1.

Can I remove the internal expander button if I am using turned neck brass?

Yes, the die includes both a standard expander button and a decapping pin retainer, giving you the flexibility to size without an expander ball when using turned necks to minimise brass work hardening. Alternatively, you can use it with the button for unturned factory brass, or remove the internal bushing and decapping assembly entirely to use the tool purely as a body die.

260 Rem AI Sizing Die - Redding 77623

The Redding 260 Rem Ackley Improved 40° Type S - Full Length Die sizes cartridge case bodies back to standard headspace dimensions while precisely regulating neck tension using interchangeable bushings. Built from heat-treated alloy steel and machined with an industry-standard 7/8"-14 thread, this die is purpose-built for the custom .260 Remington Ackley Improved cartridge featuring a 40° shoulder angle and a 0.264" bullet diameter. It allows reloaders to size the case body, bump the shoulder, and size the case neck in a single operation, or convert into a body die by removing the internal decapping and bushing assembly.

Key Features

Full-Length Resizing with Bushing Control: Fully restores case body dimensions and bumps the 40° shoulder while utilizing Type S bushings (sold separately, available in 0.001" increments) to set exact neck tension.
Self-Centering Bushing Design: Features a floating bushing mechanism that aligns with the case neck to minimise bullet runout and enhance concentricity.
Adjustable Sizing Depth: The adjustable decapping rod assembly enables handloaders to control the exact length of the neck being sized.
Dual Operation Setup: Supplied with both a standard expander button (size button #39263) for unturned factory brass and a decapping pin retainer for neck-turned brass to prevent unnecessary work hardening.
Body Die Versatility: Can be converted to a body die by removing the bushing and decapping rod to size the body and bump the shoulder without altering neck diameter.

Specifications

Brand: Redding Reloading Equipment
Model Number: 77623
Calibre: .260 Remington Ackley Improved
Shoulder Angle: 40°
Compatible Bullet Diameter: 0.264"
Die Thread Size: 7/8"-14
Practical Bushing Envelope: 0.287" to 0.295"
Shellholder Compatibility: Redding Standard Shellholder #1 (#11001) or Competition Shellholder Set #1 (#11601)
Construction: Heat-treated alloy steel with locking ring

Who is the Redding 260 Rem Ackley Improved 40° Type S - Full Length Die for?

Handloaders reloading for 260 Remington Ackley Improved 40° chamberings — requires a die specifically configured to size cartridge cases featuring a 40° shoulder angle and a 0.264" bullet diameter on standard 7/8"-14 threaded reloading presses.
Precision rifle shooters managing neck tension and bullet runout — enables exact neck sizing adjustments within a 0.287" to 0.295" bushing size envelope using a self-centering floating bushing system to maximise concentricity.
Hunters and field shooters requiring guaranteed feeding reliability — restores full cartridge case body dimensions to prevent chambering resistance and tough bolt-lift in custom bolt-action rifles, maintaining the critical 40° shoulder geometry.

Less suitable for: Standard .260 Remington cases or 30° Ackley Improved variants, which require full length sizing dies machined specifically for standard 20° or 30° shoulder angles rather than the 40° profile of this die.

SKU	RD41844LP
Model #	77623
Brand	Redding
Shipping Weight	1.0000kg

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Redding 77623 Type S Full Length Sizing Die 260 Rem Ai

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