The 8.6 Creedmoor versus 338 Federal

Published on September 9, 2018
Duration: 8:57

Expert Tyler from Kit Badger provides an in-depth comparison of the 8.6 Creedmoor and 338 Federal cartridges. He details their distinct case designs, magazine compatibility, and optimal barrel lengths, highlighting the 8.6 Creedmoor's versatility for both subsonic and supersonic applications, especially in shorter barrels. The analysis emphasizes the 8.6 Creedmoor's superior rotational kinetic energy and terminal ballistics due to its faster twist rates and ability to stabilize heavy projectiles.

Quick Summary

The 8.6 Creedmoor cartridge is distinct from the 338 Federal due to its specialized case design, derived from the 6.5 Creedmoor, which allows for heavy subsonic projectiles without seating depth issues. It is optimized for short barrels (around 12.5 inches) and uses fast twist rates (1:3 to 1:5) for superior stabilization and terminal ballistics, offering excellent versatility for both subsonic and supersonic applications.

Chapters

  1. 00:00Introduction: 8.6 Creedmoor vs 338 Federal
  2. 00:37Case Design Comparison
  3. 00:50Subsonic Load & Magazine Compatibility
  4. 01:30Platform Compatibility & Barrel Swap
  5. 01:528.6 Creedmoor as 300 Blackout's Big Brother
  6. 02:08Subsonic and Supersonic Performance
  7. 02:51Short Barrel Optimization & Twist Rate
  8. 04:19Rotational Kinetic Energy & Terminal Ballistics
  9. 05:15Versatility: Compact Package, Gas/Bolt Guns
  10. 06:14Application-Specific Performance & Future

Frequently Asked Questions

What is the main difference between 8.6 Creedmoor and 338 Federal cartridges?

The primary difference lies in their case design. The 8.6 Creedmoor uses a shortened 6.5 Creedmoor case necked up to .338, allowing for heavy subsonic projectiles without seating depth issues. The 338 Federal has a different case design not optimized for these heavy, deep-seating bullets.

Can 8.6 Creedmoor be used in standard AR-10 or SR-25 magazines?

Yes, the 8.6 Creedmoor is designed for compatibility with standard AR10, SR25, and .308 magazines. This often means only a barrel swap is needed to convert existing rifle platforms, without requiring changes to the bolt face.

Which cartridge is better for short-barreled rifles?

The 8.6 Creedmoor is optimized for short barrels (around 12.5 inches) and uses faster twist rates (1:3 to 1:5) to stabilize heavy bullets, providing superior performance and terminal ballistics in compact platforms compared to the 338 Federal.

How does 8.6 Creedmoor compare to 300 Blackout?

The 8.6 Creedmoor is described as the 'big brother' to the 300 Blackout, offering similar advantages in terms of magazine and bolt compatibility, but with increased power and ballistic capability due to its larger caliber and heavier projectile options.

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