Does A Heckler & Koch MP5SD Turn 9mm Into 380ACP Ballistically? Let's Find Out!

Published on October 25, 2021
Duration: 7:14

This video debunks the myth that a suppressed Heckler & Koch MP5SD firing 9mm ammunition is ballistically equivalent to 380 ACP. Chronograph data and ballistic gel tests demonstrate that 9mm, even when made subsonic by the MP5SD's integral suppressor and ported barrel, retains significantly more energy and penetration than 380 ACP. The presenter emphasizes that while velocity is reduced, the heavier 9mm projectile and its construction allow for effective terminal performance comparable to supersonic 9mm.

Quick Summary

The myth that a suppressed Heckler & Koch MP5SD turns 9mm ammunition into 380 ACP is false. Ballistic testing shows that even when rendered subsonic by the MP5SD's integral suppressor and ported barrel, 9mm retains significantly more energy and penetration than 380 ACP due to its heavier bullet weight and higher residual velocities.

Chapters

  1. 00:06Introduction: The MP5SD Myth
  2. 00:39MP5SD Suppressor and Porting Explained
  3. 01:14Chronograph Test: 9mm vs 380 ACP
  4. 02:50Ballistic Gel Test: Expansion and Penetration
  5. 03:37Analysis: Chronograph and Gel Results
  6. 04:38What You Actually Get with an MP5SD
  7. 05:05Debunking the 380 ACP Equivalence
  8. 05:35Conclusion and Channel Support

Frequently Asked Questions

How does the Heckler & Koch MP5SD make 9mm ammunition subsonic?

The MP5SD achieves this through a combination of a shortened barrel and ports located just ahead of the chamber. These ports bleed off gas pressure, reducing the force behind the bullet as it travels down the barrel, and the integral suppressor further aids in slowing the projectile to subsonic velocities.

Is a suppressed 9mm MP5SD ballistically the same as a 380 ACP?

No, the claim that a suppressed 9mm MP5SD is ballistically equivalent to 380 ACP is a myth. Chronograph data and ballistic gel tests show that even when rendered subsonic, 9mm ammunition from the MP5SD retains significantly more energy and penetration due to its heavier bullet weight and higher residual velocities compared to 380 ACP.

What are the ballistic gel results for 9mm fired from an MP5SD?

In ballistic gel tests, Federal 124-grain HST 9mm ammunition fired subsonically from the MP5SD demonstrated good expansion, opening up around one inch into the gel. The rounds penetrated between 14 to 16 inches, indicating effective terminal performance.

What is the practical advantage of the MP5SD's subsonic 9mm performance?

While the MP5SD reduces the power factor of 9mm rounds, the subsonic performance is still considered effective for home or self-defense distances. The terminal ballistics are comparable to what one might expect from supersonic 9mm at longer ranges, offering a quieter and potentially more controllable shooting experience.

Related News

All News →

More Tactical & Gear Videos You Might Like

More from Mrgunsngear Channel

View all →