10 Things You Must Know about Subsonic Ammo

Published on September 25, 2022
Duration: 8:01

Subsonic ammunition travels below the speed of sound (<1100 fps) to eliminate the sonic crack, making it ideal for suppressed shooting. While offering reduced recoil and quieter operation, subsonic rounds often require heavier bullets and specific barrel twist rates for stabilization. Semi-automatic firearms may also face cycling issues with lower-pressure subsonic loads, making certain platforms like bolt-action rifles or .300 Blackout ARs more suitable.

Quick Summary

Subsonic ammunition travels below the speed of sound (<1100 fps) to eliminate the sonic crack, making it ideal for suppressed shooting. While offering reduced recoil and quieter operation, subsonic rounds often require heavier bullets and specific barrel twist rates for stabilization.

Chapters

  1. 00:00Introduction to Subsonic Ammo
  2. 00:16What Makes Ammo Subsonic
  3. 00:45Subsonic Ammo and Suppressors
  4. 01:37Why Use Subsonic Ammo
  5. 02:36Limitations and Risks
  6. 03:44Firearm Selection for Subsonics
  7. 04:33Recommended Subsonic Cartridges
  8. 05:31Cartridges to Avoid for Subsonic Use
  9. 06:17Factory Subsonic Loads
  10. 06:52Handloading Subsonics
  11. 07:30Hunting Considerations with Subsonics

Frequently Asked Questions

What is subsonic ammunition and why is it used?

Subsonic ammunition travels below the speed of sound, typically under 1,100 feet per second. This eliminates the sonic crack associated with supersonic bullets, making it ideal for use with suppressors to achieve a quieter shooting experience.

What are the main benefits of using subsonic ammo?

The primary benefit is significantly reduced noise, especially when paired with a suppressor. Subsonic rounds also often have less recoil, making them more comfortable to shoot for target practice, hunting, and self-defense applications.

What are the potential drawbacks or risks of subsonic ammunition?

Heavier subsonic bullets may require specific barrel twist rates for stabilization, and unstabilized rounds can damage suppressors. Additionally, lower-pressure subsonic loads might not reliably cycle semi-automatic firearms.

Which calibers are best suited for subsonic ammunition?

Excellent choices for subsonic use include .300 Blackout, .45 ACP (which is naturally subsonic), and 147-grain 9mm. Larger calibers like .45-70 Govt and .458 SOCOM also perform well in subsonic configurations.

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