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Manufacturers Redding

Redding Expander Mandrel 0.3075

$79.00 incl GST

Redding Reloading Equipment: Total Quality Since 1946

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21542

Redding, Reloading, New Unleashed Products

Specifications

brand: redding
equipment: mandrel

Description

Redding Expander Mandrel 0.3075

The Redding Expander Mandrel 0.3075 is a precision reloading tool designed to uniform the inside diameter of case necks for .30 caliber (.308) cartridges. It is used with a compatible expander die body to deliver consistent neck tension, which is essential for accuracy and repeatable ballistic performance.

Best Suited For

  • Precision rifle reloaders using .30 caliber cartridges:
    • .308 Winchester
    • .30-06 Springfield
    • 300 Blackout
    • 300 Win Mag (neck prep stage)
  • Benchrest and long-range shooters
  • Reloaders seeking consistent neck tension and concentricity
  • Brass prep workflows involving:
    • Neck turning
    • Annealing
    • Match-grade ammo production

When To Use It

Use the 0.3075 mandrel when:

  • You want light neck tension (~0.001–0.002") for .308 bullets
  • After sizing (full-length or bushing die) to:
    • Round out case necks
    • Standardize internal diameter
  • Before bullet seating for improved consistency
  • When prepping new brass, which can arrive slightly deformed and inconsistent

Technical Information

  • Product Type: Expander mandrel
  • Diameter: 0.3075"
  • Caliber Compatibility: .30 cal / .308 bullets
  • Material: Hardened, precision-ground tool steel
  • Compatibility: Requires Redding Expander Die Body (sold separately)

FAQs

What does a 0.3075 mandrel do?
   It sets the inside diameter of the case neck, directly controlling how tightly the bullet is held (neck tension).
Why use a mandrel instead of an expander ball?
  • Better concentricity (less runout)
  • More consistent neck tension
  • Less stress on brass

Delivery and Compliance

  • Classified as a reloading tool/accessory
  • Not a controlled firearm part in NZ
  • No firearms license required for purchase

Questions?

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