Making 458x1.5 brass

      458x1.5 brass to load dummy rounds to test feeding in a custom rifle.

      • No 458x1.5 brass. Unobtainium.
      • No 458x1.5 die set. Or six months waiting list to have one made.

      .458 WinMag brass is plentiful, and easily obtained. .458 WinMag brass can be used to make .458x1.5 Barnes.

      You don't need a dedicated for caliber die set if you can find a 375H&H sizer, and a 45 ACP seating screw that fits in your .458 WinMag seating die. In this case, the threads on a Redding .45 ACP seating stem fit a Pacific Durochrome .458 Win Mag seating die.

      In pictures ...

  • Measure and Mark
  • Cutting
  • Tape Collet
  • Measure
  • Smoothing the mouth
  • Deburr
  • Compare trimmed and original
  • Trimmed with offcuts
  • Slip on collet
  • Seating with as-is brass
  • Pulled
  • Resized
  • 458 Win Mag brass, wall thickness at mouth
  • Trimmed case, wall thickness at mouth
  • Neck Turning
  • Smoothing
  • New thickness
  • Neck view
  • Alternative sizing die
  • Sized Measure
  • Donor seating screw
  • Pacific Durochrome 458 WinMag Seating die
  • Case to Bullet comparison
  • Seating Corrected
  • 600 grain cast
  • Side by side
  • Enough powder space for 600 grains at 1080 fps ?