What Is The Ideal .300 BLK Barrel Length & Ammo? (w/ Q’s Kevin Brittingham)

Published on March 25, 2025
Duration: 18:55

Kevin Brittingham discusses the ideal barrel lengths for .300 BLK, recommending 7 inches for CQB and 12-16 inches for longer ranges. He highlights the effectiveness of .300 BLK for hunting with specific supersonic and subsonic ammunition recommendations. The conversation also touches on the innovation of 8.6 Blackout, its fast 1:3 twist rate, and its potential to supersede .300 BLK due to superior energy and range.

Quick Summary

For CQB and ranges under 100 meters, a 7-inch barrel is ideal for .300 BLK. For longer distances (300-400 yards), 12 to 16-inch barrels are preferred. Barnes 110gr/120gr are good supersonic hunting rounds, while Hornady Sub-X or Lehigh bullets suit subsonic hunting.

Chapters

  1. 00:00Intro & .300 BLK Origins
  2. 01:38Ideal Barrel Lengths for .300 BLK
  3. 02:43Hunting & Ammo Selection
  4. 04:308.6 BLK & Twist Rate Innovation
  5. 08:08Is .300 BLK Becoming Obsolete?
  6. 10:00Technical Ballistics: Wear & Stabilization
  7. 11:50Accuracy & Barrel Length

Frequently Asked Questions

What is the ideal barrel length for .300 BLK in CQB situations?

For close-quarters battle (CQB) and engagements within 100 meters, Kevin Brittingham recommends a 7-inch barrel for .300 BLK, citing the Q Honey Badger as an example of this ideal configuration.

What .300 BLK ammunition is recommended for hunting?

For supersonic hunting with .300 BLK, Barnes 110gr or 120gr bullets are suggested. For subsonic hunting, options like Hornady Sub-X, Makers, or Lehigh bullets are recommended, requiring fast twist barrels.

How does barrel length affect accuracy with subsonic .300 BLK?

Shorter barrels can sometimes produce smaller groups with subsonic .300 BLK ammunition. This is because the projectile spends less time in the barrel, which helps minimize shooter-induced errors and improve consistency.

What is the significance of fast twist rates in cartridges like 8.6 Blackout?

Fast twist rates, such as the 1:3 twist in 8.6 Blackout, significantly improve terminal performance and accuracy. They increase rotational energy, which enhances stability and effectiveness on target, especially for subsonic projectiles.

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