8.6 Blackout vs 308: Can't Believe The Difference

Published on January 3, 2025
Duration: 13:45

This video compares the 8.6 Blackout and .308 Winchester calibers through various barrier tests, including lumber, concrete, and mild steel. While the .308 Winchester demonstrated superior penetration against mild steel and higher muzzle velocity/energy, the 8.6 Blackout showed impressive performance in lumber penetration with significant tumbling and exceptional performance in a sand box test. The high RPM of the 8.6 Blackout, due to its 1:3 twist rate, was noted for its dramatic effect on water jugs.

Quick Summary

The .308 Winchester offers higher supersonic performance with 2551 FPS and 2428 ft-lbs energy using a 168gr bullet. The 8.6 Blackout, with a 210gr bullet, achieves 2085 FPS and 2027 ft-lbs but excels in lumber penetration and shows dramatic effects due to its high RPM from a 1:3 twist rate.

Chapters

  1. 00:00Introduction: 8.6 Blackout vs 308
  2. 00:28Lumber Penetration Test
  3. 01:20Ammunition Specs: TSX Bullets
  4. 02:34Concrete Paver Test
  5. 04:16Mild Steel Penetration Test
  6. 05:49DNT ThermNight Optic Showcase
  7. 06:48Chronograph Data: Velocity & Energy
  8. 07:06Water Jug Test & RPM Effects
  9. 08:39Bullet RPM Calculation
  10. 10:14Sand Box Penetration Test

Frequently Asked Questions

How does 8.6 Blackout compare to 308 Winchester in barrier testing?

In barrier tests, the 8.6 Blackout showed impressive lumber penetration with tumbling, while the .308 Winchester offered consistent penetration. The .308 penetrated mild steel, but the 8.6 Blackout did not. Both penetrated concrete pavers.

What are the key ballistic differences between 8.6 Blackout and 308 Winchester?

The .308 Winchester has higher muzzle velocity (2551 FPS) and energy (2428 ft-lbs) with a 168gr bullet. The 8.6 Blackout, with a 210gr bullet, has lower velocity (2085 FPS) and energy (2027 ft-lbs) but a much higher RPM due to its 1:3 twist rate.

What is the significance of the 1:3 twist rate in the 8.6 Blackout?

The 1:3 twist rate in the 8.6 Blackout allows it to stabilize heavier, longer bullets at lower velocities, resulting in extremely high bullet RPM (over 500,000 RPM). This high spin rate causes dramatic effects on targets like water jugs.

Which caliber is better for supersonic performance between 8.6 Blackout and 308 Winchester?

On paper, the .308 Winchester appears stronger for supersonic performance due to its higher muzzle velocity and energy. The 8.6 Blackout is often favored for its subsonic capabilities and unique performance characteristics with heavy bullets.

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