223 Remington - 62gr Lehigh Controlled Chaos

Published on February 12, 2025
Duration: 51:17

This video details a test comparing the accuracy of Lehigh Defense 62gr Controlled Chaos copper solid bullets in a clean versus fouled barrel. The presenter, an experienced firearms instructor, meticulously loads ammunition and conducts shooting tests to investigate the impact of copper fouling on accuracy. The experiment aims to determine if a clean barrel is essential for optimal performance with solid copper projectiles, a common concern in reloading and precision shooting.

Quick Summary

An expert firearms instructor tested Lehigh Defense 62gr Controlled Chaos copper bullets in a 223 Remington AR-15 to compare accuracy between a clean and fouled barrel. The clean barrel yielded a 2.49-inch group, while the fouled barrel produced a 2.58-inch group, indicating a slight accuracy degradation with fouling.

Chapters

  1. 00:00Introduction: Copper Bullet Accuracy Mission
  2. 01:00Understanding Bullet Jacket Materials: Copper vs. Gilding Metal
  3. 02:35The Importance of a Clean Barrel for Pure Copper Bullets
  4. 05:50Test Rifle Setup: AR-15 with SPR Barrel
  5. 06:02Deep Barrel Cleaning: Tackling Carbon and Copper Fouling
  6. 07:56Test Plan: Clean vs. Fouled Barrel Comparison
  7. 10:50Reloading Data: Lehigh 62gr Controlled Chaos
  8. 12:21Brass Preparation: New Lake City 556 Brass
  9. 17:00Case Mouth Chamfering for Bullet Seating
  10. 18:49Powder Measurement: Ramshot Tac
  11. 24:06Bullet Seating Process
  12. 28:39Range Test: Zeroing and First 25-Round Group
  13. 33:41Borescope Inspection After First Group
  14. 35:17Fouling Shots: PPU and Mixed Brass Ammunition
  15. 39:08Baseline Accuracy Check: Speer Gold Dot
  16. 40:42Second 25-Round Group: Fouled Barrel Test
  17. 43:52Analysis: Clean vs. Fouled Barrel Results & Mean Radius
  18. 47:08Future Video Plans & Barrel Cleaning Discussion Clarification
  19. 50:57Conclusion and Next Steps

Frequently Asked Questions

What is the primary goal of the accuracy test in this video?

The primary goal is to determine if a clean barrel or a fouled barrel yields better accuracy when shooting Lehigh Defense 62gr Controlled Chaos copper solid bullets in a 223 Remington caliber.

What ammunition and components were used for the 223 Remington reloading test?

The test used Lehigh Defense 62gr Controlled Chaos bullets, 24.0 grains of Ramshot Tac powder, CCI 450 small rifle magnum primers, and new Lake City 556 brass, with an overall length of 2.250 inches.

How did the barrel fouling affect the accuracy of the Lehigh copper bullets?

The first 25-shot group in a clean barrel measured 2.49 inches, while the second 25-shot group after fouling measured 2.58 inches. The mean radius also increased slightly, suggesting a minor negative impact from fouling.

What is the difference between gilding metal and pure copper in bullet construction?

Gilding metal is an alloy, typically 95% copper and 5% zinc, used for bullet jackets. Pure copper bullets are made entirely of copper, which is softer and may interact differently with barrel fouling.

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