Altering a 50 Caliber Bullet Mold Presented by Larry Potterfield | MidwayUSA Reloading

Published on February 7, 2014
Duration: 3:03

This guide details how Larry Potterfield modifies a Lee Precision .515-450-F bullet mold to cast lighter bullets for the obsolete .50 Remington cartridge. By milling off grease grooves, the bullet weight is reduced from 450 grains to approximately 290 grains, allowing for a custom load. The process involves precise machining and reloading techniques.

Quick Summary

Expert gunsmith Larry Potterfield demonstrates how to modify a Lee Precision .515-450-F bullet mold using a milling machine. By removing grease grooves, the bullet weight is reduced from 450 grains to approximately 290 grains, enabling custom loads for the obsolete .50 Remington cartridge.

Chapters

  1. 00:00Introduction to Remington Rolling Blocks
  2. 00:51Modifying Brass for .50 Remington
  3. 01:22Bullet Mold Selection and Modification
  4. 02:06Milling the Mold
  5. 02:28Casting and Loading Custom Rounds

Frequently Asked Questions

How can I cast lighter bullets for obsolete cartridges like the .50 Remington?

For obsolete cartridges like the .50 Remington, you can modify a standard bullet mold. As shown by Larry Potterfield, this involves using a milling machine to remove material, such as grease grooves, to reduce the bullet's weight to the desired specification, like 290 grains from a 450-grain mold.

What tools are needed to modify a bullet mold?

Modifying a bullet mold typically requires precision machine shop tools. Essential equipment includes a milling machine, a milling vice for secure mounting, and accurate measuring tools like Starrett digital calipers. A lathe may also be needed for case modification.

Can .50-70 Government cases be used for .50 Remington reloads?

Yes, .50-70 Government cases can be adapted for the .50 Remington cartridge. Larry Potterfield demonstrates using a lathe to turn down the rim diameter and shorten the case length to match the specific dimensions required for the .50 Remington.

What is the purpose of modifying a bullet mold?

Modifying a bullet mold is done to achieve specific bullet weights or designs not available from standard molds. This is crucial for specialized applications, historical firearms, or obsolete cartridges where standard components may not function correctly or safely.

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