What calibre transition is the Redding 16364 tapered size button specifically engineered to handle?

The Redding 16364 is engineered to smoothly expand cartridge case mouths starting from .30 calibre (nominal .308 inches) up to 9.3mm (nominal .366 inches). Attempting to use this button to expand from smaller calibres like .22 or 6.5mm in a single step risks crushing the case shoulder.

Which reloading dies are compatible with this Redding tapered size button?

This sizing button is compatible with Redding standard full-length sizing dies, neck sizing dies, and Type S Bushing sizing dies. Please note that a decapping rod is not included with the 16364 and must be sourced separately or reused from your existing Redding setup.

Do I need any special electrical certifications or 240V plugs to use this tool in my Australian reloading shed?

No. The Redding 16364 is a purely non-powered mechanical reloading accessory made of heat-treated steel, so standard Australian electrical certifications, SAA approvals, and 240V plug requirements do not apply.

What accessories should I use alongside this button to ensure smooth case neck expansion for hunting loads?

For optimal performance when forming wildcat brass for large game like sambar deer or buffalo, it is strongly recommended to use Redding Imperial Sizing Die Wax to lubricate the brass and prevent galling. This ensures the gradual taper minimises neck wall runout and prevents shoulder buckling.

9.3mm Sizing Button - Redding 16364

The Redding Tapered Size Button From 30 To 9.3 Cal (Part Number 16364) is a precision-machined, heat-treated steel reloading die component designed to expand cartridge case mouths from .30 calibre (.308") up to 9.3mm (.366") in a single pass. Featuring an elongated, gradual taper, this expander button replaces standard elliptical expander balls to smoothly open case necks while minimising neck wall runout, shoulder buckling, and brass stretch. It installs onto Redding decapping rods and is compatible with standard Redding full-length sizing dies, neck sizing dies, and Type S Bushing sizing dies.

Key Features

Gradual Tapered Profile: Engineered to expand case mouths from .30 calibre to 9.3mm with reduced friction and minimal brass distortion.
Precision-Machined Steel: Manufactured from heat-treated steel to withstand the mechanical forces of single-pass neck expanding and wildcat case forming.
Die Compatibility: Fits Redding standard full-length, neck sizing, and Type S Bushing sizing die assemblies (requires existing or separately sourced Redding decapping rod).
Reduced Case Stress: Eliminates abrupt internal expander resistance, preventing case neck stretching and shoulder collapse during the extraction stroke.

Specifications

Manufacturer: Redding Reloading Equipment
Part Number: 16364
Material: Heat-treated steel
Starting Calibre: .30 calibre (nominal .308")
Target Calibre: 9.3mm (nominal .366")
Power Requirement: Non-powered mechanical tool
Weight: Under 30 grams

Who is the Redding Tapered Size Button From 30 To 9.3 Cal for?

Handloaders converting parent brass into 9.3x62mm Mauser — expands .30-06 Springfield or .300 Win Mag brass starting at .30 calibre (.308") up to 9.3mm (.366") in a single, fluid pass without buckling case shoulders using this reloading press expander button.
Reloaders building wildcat ammunition for large feral game — provides smooth, single-stage expansion up to 9.3mm (.366") from readily available .30 calibre parent cases to produce hunting rounds for Australian sambar deer, scrub bulls, and buffalo.

Less suitable for: Handloaders attempting to expand brass starting from calibres smaller than .30 calibre (such as .22 up to 6.5mm), which exceed single-step expansion thresholds and require stepped intermediate expanding mandrels to prevent shoulder collapse.

SKU	RD41471LP
Model #	16364
Brand	Redding
Shipping Weight	1.0000kg

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Redding 16364 Tapered Size Button 30 To 9 3mm Caliber Steel Tool

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