.300 Blackout AR Pistol Subsonic Vs. Supersonic Ammo Clay Test. Takin' a Break From the Ammo Hunt.

Published on February 7, 2021
Duration: 8:05

This video demonstrates a comparative test of subsonic and supersonic .300 Blackout ammunition fired from an AR pistol with an 8.5-inch barrel. The test utilizes clay blocks to visually assess the terminal performance of each ammunition type. The presenter, an experienced shooter, highlights the significant difference in impact energy and projectile effect between the two loads.

Quick Summary

Testing .300 Blackout subsonic versus supersonic ammunition from an AR pistol reveals a significant difference in terminal ballistics. Supersonic rounds, like the 110-grain Nosler at ~2100 fps and 1128 ft-lbs, cause far more destructive impact on targets than subsonic rounds, such as the 260-grain Atomic at ~1050 fps and 637 ft-lbs.

Chapters

  1. 00:00Introduction and Test Setup
  2. 00:50Ammunition Overview: Subsonic vs. Supersonic
  3. 01:03Supersonic Ammunition Details (Nosler 110gr)
  4. 01:29Subsonic Ammunition Details (Atomic 260gr)
  5. 02:03Firearm Used: .300 Blackout AR Pistol
  6. 02:12Target Setup: Clay Blocks
  7. 03:21First Shot: Subsonic .300 Blackout
  8. 04:27Subsonic Impact Analysis
  9. 05:21Second Shot: Supersonic .300 Blackout
  10. 06:33Supersonic Impact Analysis
  11. 07:03Comparison of Terminal Ballistics
  12. 07:37Conclusion and Outro

Frequently Asked Questions

What is the primary difference between subsonic and supersonic .300 Blackout ammunition?

The main difference lies in velocity and projectile weight. Supersonic .300 Blackout, like the 110-grain Nosler tested, travels at higher speeds (around 2100+ fps) with less energy (around 1128 ft-lbs). Subsonic .300 Blackout, such as the 260-grain Atomic, moves slower (around 1050 fps) with less energy (around 637 ft-lbs), resulting in a less destructive impact.

How does .300 Blackout compare to 5.56 NATO in terms of AR-15 platform compatibility?

.300 Blackout is highly compatible with the AR-15 platform. You can typically convert a 5.56 NATO AR-15 to fire .300 Blackout by simply changing the barrel. Other components like the bolt carrier group, upper and lower receivers, and magazines generally remain the same.

What was the observed terminal performance difference between subsonic and supersonic .300 Blackout on clay targets?

The supersonic .300 Blackout round caused significantly more damage to the clay targets, shattering them more violently and dispersing fragments over a wider area. The subsonic round also impacted the clay, but with less explosive force and fragmentation compared to its supersonic counterpart.

What firearm was used for the .300 Blackout ammunition test?

The test utilized a .300 Blackout AR pistol equipped with an 8.5-inch barrel and a Sig Sauer Romeo optic. This setup is representative of common AR pistol configurations chambered in .300 Blackout.

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