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Manufacturers Redding

Redding Expander Mandrel 0.2425

$79.00 incl GST

Redding Reloading Equipment: Total Quality Since 1946

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21507

Redding, Reloading, New Unleashed Products

Specifications

brand: redding
equipment: mandrel

Description

Redding Expander Mandrel 0.2425

The Redding Expander Mandrel 0.2425 (#21507) is a precision reloading tool used to uniform and expand the inside diameter of cartridge case necks for 6mm / .243 caliber brass.

  • Designed for use with a Redding Expanding Die body
  • Helps achieve consistent neck tension for better bullet seating
  • Made from hardened, precision-ground tool steel for durability and accuracy

Best Suited For

  • Precision rifle reloading (benchrest, long-range shooting)
  • 6mm / .243 cartridges (e.g., .243 Win, 6mm BR)
  • Shooters wanting consistent neck tension across all rounds
  • Reloaders using bushing dies or neck turning setups
👉 Ideal for those chasing maximum accuracy and consistency

When To Use It

✔️ After sizing (especially with bushing dies)
  • Expands neck to a uniform internal diameter
✔️ Before bullet seating
  • Ensures consistent bullet grip (neck tension)
✔️ When prepping new brass
  • Fixes inconsistencies from factory or shipping damage
  • Creates a uniform starting point for loading
✔️ During neck turning workflows
  • Sets correct internal diameter before turning

Specification

  • Brand: Redding
  • Model / Part #: 21507
  • Diameter: 0.2425" (for .243 / 6mm)
  • Material: Hardened tool steel

FAQs

What does this mandrel actually do?
  • Expands the inside of the case neck
  • Creates consistent neck tension for better accuracy
Why 0.2425" specifically?
  • Slightly under typical .243 bullet diameter (~0.243")
  • Provides controlled grip on the bullet
Can it fix damaged brass?
Yes — helps:
  • Round out necks
  • Fix minor dents
  • But not for severely damaged cases

Delivery & Compliance

The Redding Expander Mandrel 0.2425" is fully legal and unrestricted in New Zealand. It ships easily, requires no license, and is treated as a standard reloading accessory.


 

Questions?

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