Firearms Facts: 7.62x39mm vs 300 Blackout

Published on April 30, 2018
Duration: 25:07

This video compares the 7.62x39mm and .300 Blackout cartridges, highlighting their ballistic performance, platform compatibility, and cost. While 7.62x39mm offers superior case capacity and cheaper ammo, .300 Blackout excels in short-barreled AR-15 platforms, especially for suppressed and subsonic use. Both have distinct advantages for hunting and self-defense applications.

Quick Summary

.300 Blackout excels in short-barreled AR-15 platforms and suppressed use, reliably cycling subsonic ammunition with fast-burning powders. 7.62x39mm offers lower ammo costs and superior velocity/energy with heavier bullets due to greater case capacity.

Chapters

  1. 00:00Introduction & Trajectory Comparison
  2. 01:07Origins of .300 Blackout
  3. 02:07AR-15 Platform Compatibility
  4. 03:07Specialized 7.62x39 AR Hybrids
  5. 05:14Ammo Cost and Availability
  6. 06:15Ballistic Performance Comparison
  7. 09:31Short Barrel & Subsonic Performance
  8. 11:08Hunting Applications
  9. 17:29Final Verdict & Preferences

Frequently Asked Questions

What are the main advantages of 7.62x39mm over .300 Blackout?

7.62x39mm generally offers significantly lower ammunition costs due to the availability of surplus and commercial steel-case loads. It also boasts greater case capacity, leading to higher velocities and energy with heavier bullets from comparable barrel lengths.

When is .300 Blackout the better choice compared to 7.62x39mm?

.300 Blackout excels in short-barreled AR-15 platforms, especially for suppressed use. It's optimized for fast-burning powders, reliably cycles subsonic ammunition, and maintains compatibility with standard AR-15 components without proprietary parts.

How do 7.62x39mm and .300 Blackout compare in AR-15 platforms?

Running .300 Blackout in an AR-15 requires only a barrel change and uses standard magazines and bolts. 7.62x39mm in a standard AR-15 often necessitates a proprietary bolt, barrel, and specialized magazines, leading to potential reliability issues.

What are the ballistic differences between 7.62x39mm and .300 Blackout?

7.62x39mm, with its larger case capacity, typically achieves higher velocities and energy, especially with heavier bullets (e.g., 154gr at 2100 fps). .300 Blackout (e.g., 150gr at 2000 fps) is optimized for shorter barrels and subsonic performance.

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