Does Barrel Size Matter?

Published on September 29, 2025
Duration: 1:17

This video demonstrates how barrel length significantly impacts the terminal ballistics of a 9mm projectile. Testing with 2-inch, 4-inch, and 16-inch barrels showed increased wound channel depth and energy transfer with longer barrels, primarily due to higher muzzle velocity. While longer barrels enhance lethality, even the shortest barrel proved effective.

Quick Summary

Longer 9mm barrels increase muzzle velocity, leading to greater energy transfer and deeper wound channels in ballistics gelatin. While a 16-inch rifle barrel showed the most dramatic effect, even a 4-inch pistol barrel outperformed a 2-inch subcompact, demonstrating increased lethality with length.

Chapters

  1. 00:00Introduction: Barrel Length Experiment
  2. 00:13Testing 2-inch Subcompact Barrel
  3. 00:27Testing 4-inch Full-Size Barrel (Girsan)
  4. 00:45Testing 16-inch Rifle Barrel
  5. 01:09Conclusion: Barrel Length Impact

Frequently Asked Questions

How does 9mm barrel length affect terminal ballistics?

Longer 9mm barrels increase muzzle velocity, leading to greater energy transfer and deeper wound channels in ballistics gelatin. While a 16-inch rifle barrel showed the most dramatic effect, even a 4-inch pistol barrel outperformed a 2-inch subcompact.

Is a longer barrel always more deadly for 9mm?

Longer barrels increase lethality due to higher velocity, but the test showed that even a 2-inch barrel produced significant damage. All tested barrel lengths proved effective, though the degree of effectiveness increases with length.

What was tested in the barrel length experiment?

The experiment tested a 9mm projectile fired from barrels of 2-inch (subcompact), 4-inch (full-size pistol), and 16-inch (rifle) lengths. The results were observed using ballistics gelatin.

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