Should Your Magnum be Belted Or Non-Belted?

Published on July 27, 2022
Duration: 33:50

This video provides an expert-level breakdown of belted versus non-belted magnum cartridges, drawing on the speaker's extensive experience. It details the historical origins of belted magnums, primarily the 375 H&H, explaining the necessity of the belt for proper headspacing due to early powder types and case design. The discussion covers the functional differences, potential issues like case head separation in belted cartridges, and the impact of overbore cartridges on barrel life. The speaker, a seasoned firearms enthusiast, offers practical advice for handloaders and those selecting magnum cartridges.

Quick Summary

The belt on magnum cartridges, like the 375 H&H, was historically necessary for proper headspacing due to case design and early powder types. While not adding strength, it aids feeding. However, belted cases are prone to case head separation, a dangerous issue for handloaders, making non-belted magnums often a better choice for longevity and safety.

Chapters

  1. 00:01Introduction & Weather Delay
  2. 00:27Topic: Magnum Cartridges
  3. 00:42Speaker's Magnum Experience: 458 Win Mag
  4. 01:32Speaker's Magnum Experience: 416 Rem Mag
  5. 01:57416 Rem Mag Penetration Test Anecdote
  6. 03:19Speaker's Magnum Experience: 375 H&H Magnum
  7. 04:48Speaker's Magnum Experience: 300 Win Mag
  8. 06:00Focus: Magnum Cartridge Construction Differences
  9. 06:37History of Belted Magnums: 375 H&H
  10. 08:09The Purpose of the Belt
  11. 10:43Belt Strength Myth Debunked
  12. 11:20Feeding Issues with Rimmed/Semi-Rimmed Cases
  13. 12:12American Magnum Development: 458 Win Mag
  14. 13:56Winchester Shortening the 375 Case
  15. 14:13300 Win Mag and Case Tooling
  16. 15:05Remington & Other Magnums
  17. 15:21Brass Manufacturing
  18. 16:01Tooling Efficiency in Case Manufacturing
  19. 17:01Handloading Issues: Case Head Separation
  20. 17:36Mechanism of Case Stretching
  21. 18:53Dangers of Case Head Separation
  22. 20:06Anecdote: Corrosive Ammo & Case Failure
  23. 21:03Handloader's Approach to Belted Magnums
  24. 21:55Limiting Stretching via Resizing
  25. 23:31Field Issues with Limited Headspacing
  26. 23:59The 404 Jeffrey as an Alternative
  27. 24:44Short Magnum Feed Smoothness Debate
  28. 25:14Advantages of Non-Belted Magnums for Handloaders
  29. 25:3230 Caliber Magnum Comparison
  30. 26:47Giant Magnums & Barrel Wear
  31. 27:38Barrel Life: 264 Win Mag Example
  32. 28:49Barrel Life: 223 WSSM Example
  33. 30:41Selecting a Magnum: Key Considerations
  34. 30:55Belted vs. Non-Belted: Handloader's Choice
  35. 31:30Conclusion: Belted Magnums & Alternatives
  36. 31:43Speaker's Pragmatic Approach
  37. 32:26Enjoying Standard Cartridges
  38. 32:47Outro & Project Update

Frequently Asked Questions

What is the primary reason for the belt on magnum cartridges like the 375 H&H?

The belt on magnum cartridges, originating with the 375 H&H, was primarily designed to ensure proper headspacing. This was necessary due to the case's subtle taper and the historical use of cordite powder, which prevented reliable headspacing on the shoulder alone.

What are the main drawbacks of belted magnum cartridges for handloaders?

Belted magnum cartridges are prone to case head separation, a dangerous condition where the case stretches and thins just forward of the belt. This issue is less common with non-belted magnums, making them a preferred choice for handloaders seeking better case life and safety.

How do overbore cartridges affect firearm longevity?

Overbore cartridges, which use a large powder capacity relative to their bore diameter, significantly reduce barrel life. Data from sources like Hornady's manual shows that barrels can experience substantial wear after only a few hundred rounds, impacting accuracy and longevity.

Are belted magnum cases stronger than non-belted ones?

No, the belt on a magnum cartridge does not add structural strength. Its sole function is to provide a positive stop for headspacing and to aid in feeding, particularly in firearms designed for this case type. The strength of the case is determined by its brass thickness and construction.

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