9MM vs .300 Blackout!...Subsonic Home Defense!

Published on November 22, 2022
Duration: 13:17

This guide details a comprehensive ballistic gel testing methodology for comparing subsonic handgun and rifle calibers, specifically 9mm Luger and .300 Blackout, for home defense applications. The expert-led demonstration includes setup, live-fire testing with chronograph readings, and detailed analysis of projectile performance, emphasizing expansion, penetration, and weight retention. The instructor, demonstrating significant expertise, provides insights into the practical application of these rounds from short-barreled platforms.

Quick Summary

Expert ballistic gel testing comparing subsonic 9mm and .300 Blackout rounds for home defense revealed that the 9mm Winchester Ranger T-Series 147gr offered superior expansion and penetration from short-barreled pistols, while the .300 Blackout Hornady Sub-X 190gr delivered slightly more energy due to its heavier projectile.

Chapters

  1. 00:00Introduction & Testing Setup
  2. 00:53Ammunition Selection & Rationale
  3. 02:57Firearms Used for Testing
  4. 03:45Chronograph Testing - 9mm
  5. 04:38Chronograph Testing - .300 Blackout
  6. 05:39Velocity & Energy Comparison
  7. 06:14Gel Ballistic Testing - 9mm
  8. 06:44Gel Ballistic Testing - .300 Blackout
  9. 09:13Recovered Projectile Examination
  10. 10:19Weight Retention & Expansion Metrics
  11. 11:14Conclusion & Personal Recommendation
  12. 11:57Final Thoughts & Channel Promotion

Frequently Asked Questions

How does 9mm subsonic compare to .300 Blackout subsonic in ballistic gel tests?

In tests using short-barreled pistols, 9mm subsonic (147gr T-Series) showed greater expansion (0.754-0.774") and penetration (21.25") than .300 Blackout subsonic (190gr Sub-X, 0.418-0.432" expansion, 17" penetration), despite the .300 Blackout having slightly more energy (421 vs 391 ft-lb).

What are the key performance metrics for subsonic home defense ammunition?

Key metrics include projectile velocity (measured by chronograph), energy (ft-lb), expansion diameter (inches), penetration depth (inches), and weight retention (percentage). These factors determine the ammunition's effectiveness in incapacitating a threat and its behavior within barriers.

Which subsonic round is better for home defense from a short-barreled pistol: 9mm or .300 Blackout?

Based on specific subsonic tests with 8-inch barreled pistols, the 9mm Winchester Ranger T-Series 147gr is slightly favored due to superior expansion and penetration, with only a marginal energy deficit compared to the .300 Blackout Hornady Sub-X 190gr. Both performed well.

How does projectile weight affect energy in subsonic ammunition?

Projectile weight significantly impacts energy. The .300 Blackout 190gr round, though slower, generated more energy (421 ft-lb) than the 9mm 147gr round (391 ft-lb) because the increased mass compensated for the lower velocity, illustrating that heavier bullets can be advantageous.

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