Will the Redding 48256 carbide size button kit fit my Redding Competition Bushing Neck Sizing Die?

No, this kit is not compatible with Redding Competition Bushing Neck Sizing Dies, which require a dedicated competition carbide kit series. It is designed to fit standard Redding Full-Length sizing dies, standard Neck sizing dies, and Type-S Bushing dies using standard decapping rod assemblies.

Do I still need to lubricate case necks inside when using this carbide size button?

One of the primary benefits of the tungsten carbide button is that its low coefficient of friction eliminates the need for inside-neck case lubrication. However, you must still apply external case body lubrication when using full-length sizing dies to prevent cases from sticking in the die.

What specific calibres are compatible with the Redding 48256 size button kit?

This kit is strictly limited to .25 calibre (.257") bottleneck rifle cartridges, such as the .257 Roberts, .25-06 Remington, and .257 Weatherby Magnum. Other calibres require their own dedicated part numbers, such as #48242 for 6mm or #48263 for 6.5mm.

Carbide Size Button Kit - Redding 48256

The Redding 25 Cal. Carbide Size Button Kit (MPN: 48256) upgrades Redding reloading dies by replacing standard steel expander balls with a free-floating tungsten carbide sizing button. Designed specifically for .25 calibre (.257") bottleneck rifle cartridges, the kit provides low-friction interior neck expansion on the decapping rod spindle. The hardness and low coefficient of friction of the carbide material allow the button to pass through case necks smoothly, eliminating the need to apply and clean internal neck lubricants while reducing shoulder distortion and brass stretch.

Key Features

Tungsten Carbide Construction: The ultra-hard carbide expander button glides through brass case necks without requiring inside-neck lubrication.
Free-Floating Self-Centring Design: Floats on the standard decapping spindle to align naturally with the case neck during the expansion stroke, minimising neck runout.
Complete Replacement Assembly: Includes the carbide expander button, retainer assembly, and a spare decapping pin.
Streamlined Brass Preparation: Removes the requirement for manual inside-neck lubing and subsequent cleaning cycles during cartridge reloading.

Specifications

Manufacturer Part Number (MPN): 48256
Calibre Compatibility: .25 Calibre / .257" bottleneck rifle cartridges (e.g., .257 Roberts, .25-06 Remington, .257 Weatherby Magnum)
Die Compatibility: Redding standard Full-Length sizing dies, standard Neck sizing dies, and Type-S Bushing dies
Packaged Shipping Weight: 59 g (2.08 oz)
Power Source: Manual mechanical operation

Who is the Redding 25 Cal. Carbide Size Button Kit for?

Precision Handloaders for .25-Calibre Rifles — Floating self-centring action on the decapping spindle minimises neck runout when resizing .25 calibre (.257") bottleneck rifle cartridges using standard Redding Full-Length, Neck, or Type-S dies.
High-Volume .25 Calibre Reloaders — Hard tungsten carbide construction eliminates the inside-neck lubrication step entirely across .25 calibre (.257") brass processing, reducing case preparation time while adding just 59 g of packaged tooling to the bench setup.

Less suitable for: Handloaders running Redding Competition Bushing Neck Sizing Dies, which require a dedicated competition-series carbide sizing kit, or cartridges outside of the .25 calibre (.257") boundary, which require alternative calibre-specific expander tooling.

SKU	RD41645LP
Model #	48256
Brand	Redding
Shipping Weight	1.0000kg

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Redding 48256 25 Cal Carbide Size Button Kit 257 Calibre

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