When Is .300BLK Better Than 5.56?

Published on May 24, 2022
Duration: 16:00

This video compares .300 Blackout and 5.56 NATO, concluding .300 BLK excels in close quarters, short barrels, and suppressed applications due to efficient powder burn. 5.56 remains superior for longer distances (300+ yards) and offers better cost and availability. Testing highlights .300 BLK's effectiveness in compact platforms like the SIG Rattler and its quieter suppressed performance compared to short-barreled 5.56 rifles.

Quick Summary

.300 Blackout is superior for close quarters, short barrels, and suppressed use due to efficient powder burn in 8-9 inch barrels. 5.56 NATO remains better for distances over 300 yards and offers greater cost-effectiveness and availability.

Chapters

  1. 00:00Intro: .300 BLK vs 5.56 Comparison
  2. 02:005.56 NATO Ballistics Explained
  3. 03:40.300 Blackout Ballistics Compared
  4. 04:56Why .300 BLK Excels Suppressed & Short Barrels
  5. 07:15Range Test: FN SCAR 16S (5.56)
  6. 08:13Range Test: LWRC DI ( .300 BLK)
  7. 10:34Range Test: Daniel Defense MK18 (5.56 SBR)
  8. 13:05Range Test: SIG MCX Rattler (.300 BLK)
  9. 14:45Final Verdict: .300 BLK vs 5.56

Frequently Asked Questions

When is .300 Blackout a better choice than 5.56 NATO?

.300 Blackout is superior for close quarters, short-barreled rifles (SBRs), and suppressed shooting. It achieves efficient powder burn in barrels as short as 8-9 inches, offering better performance and handling in compact platforms.

What are the advantages of 5.56 NATO over .300 Blackout?

5.56 NATO generally offers better performance at longer distances, typically beyond 300 yards. It also boasts wider availability and often lower ammunition costs, making it a more economical choice for high-volume shooting.

How does .300 Blackout perform with suppressors?

.300 Blackout is highly effective when suppressed, especially with subsonic ammunition. It provides significant sound reduction and maintains good energy in short barrels, unlike some suppressed 5.56 SBRs which can be overly 'gassy'.

What are the muzzle energy differences between .300 BLK and 5.56?

A 125gr .300 Blackout from a 16-inch barrel delivers 1313 ft/lbs of energy. A 62gr 5.56 NATO from a 20-inch barrel produces 1289 ft/lbs, showing .300 BLK can have higher muzzle energy in comparable setups.

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