Suppressed 300 Blackout - Subsonic vs Supersonic Ammo!

Published on April 24, 2019
Duration: 9:49

This video compares subsonic and supersonic 300 Blackout ammunition when used with a suppressor. Subsonic rounds are significantly quieter, eliminating the supersonic crack, while supersonic rounds still produce a noticeable crack downrange. Terminal ballistics testing shows the supersonic 110gr V-MAX fragmenting with a large wound cavity and 14 inches of penetration, whereas the subsonic 208gr A-MAX tumbled and showed less expansion.

Quick Summary

Suppressors reduce muzzle blast, but subsonic 300 Blackout ammo is needed to eliminate the supersonic crack. Subsonic rounds are much quieter, allowing the shooter to hear the target impact clearly, while supersonic rounds still produce a distinct crack downrange.

Chapters

  1. 00:00Intro: Suppressed 300 Blackout Rifle
  2. 00:35Understanding Gunshot Noise: Blast vs Crack
  3. 01:15Ammo Comparison: Hornady 110gr V-MAX vs 208gr A-MAX
  4. 01:50Live Fire: Supersonic vs Subsonic Sound
  5. 04:40Ballistics Gel Test: Terminal Performance

Frequently Asked Questions

What is the main difference between subsonic and supersonic 300 Blackout ammo when suppressed?

When suppressed, subsonic 300 Blackout ammo eliminates the 'crack' sound of the bullet breaking the sound barrier, making the shot significantly quieter. Supersonic ammo still produces this crack, even with a suppressor reducing the muzzle blast.

How does suppressed subsonic 300 Blackout sound compared to supersonic?

Subsonic 300 Blackout rounds fired through a suppressor are remarkably quiet, often described as 'movie quiet.' The shooter can clearly hear the bullet impact the target, sometimes louder than the shot itself, unlike the distinct crack of supersonic rounds.

What were the terminal ballistics results for 300 Blackout subsonic vs supersonic rounds?

The 110gr supersonic V-MAX penetrated 14 inches in gel, fragmenting with a large wound cavity. The 208gr subsonic A-MAX tumbled, showed less expansion, and exited the side of the gel block.

What causes gunshot noise, and how does a suppressor affect it?

Gunshot noise has two main components: muzzle blast (the explosion) and the supersonic crack (bullet exceeding sound speed). A suppressor significantly reduces the muzzle blast, but only subsonic ammunition eliminates the supersonic crack.

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