Grizzly 9mm +P vs Underwood +P+! Ballistic Gel Test With The Sig P365!

Published on January 21, 2022
Duration: 13:43

This video compares the ballistic performance of Grizzly 9mm +P and Underwood 9mm +P+ ammunition fired from a Sig P365 with a 3-inch barrel. Both loads demonstrated significant expansion and velocity, though the Underwood +P+ shed more mass. The instructor notes that while these loads are powerful, the added recoil and flash might not be worth the marginal performance gains over standard loads, suggesting alternatives like Federal's 9mm HST (V-Crown) for comparable performance with less violence.

Quick Summary

Comparing Grizzly 9mm +P and Underwood 9mm +P+ 115gr JHP from a Sig P365, both loads achieved similar velocities (around 1270 fps). The Underwood shed more mass in gel, while the Grizzly retained more and achieved slightly deeper penetration. Both expanded significantly, but the instructor notes the added recoil and flash from these hotter loads.

Chapters

  1. 00:00Introduction & Setup
  2. 00:41Ammunition Overview
  3. 01:12Sig P365 & Barrel Length
  4. 01:40Underwood +P+ Velocity Test
  5. 02:37Grizzly +P Velocity Test
  6. 03:38Ballistic Gel Test Begins
  7. 04:01Underwood +P+ Gel Results
  8. 04:28Grizzly +P Gel Test
  9. 05:43Gel Results Comparison
  10. 08:11Penetration Depth Data
  11. 08:50Projectile Weight Retention
  12. 09:55Projectile Expansion Size
  13. 11:08Projectile Condition Summary
  14. 11:10Conclusion & Discussion
  15. 12:11Muzzle Flash Observation
  16. 13:11Channel Support & Outro

Frequently Asked Questions

What are the key differences between Grizzly 9mm +P and Underwood 9mm +P+ ammunition in a Sig P365?

Both loads achieved similar velocities (around 1270 fps) from a 3-inch barrel. The Underwood +P+ shed more mass in gel, while the Grizzly +P retained more and achieved slightly deeper penetration. Both expanded significantly, but the instructor notes the added recoil and flash from these hotter loads.

How did the Underwood 9mm +P+ 115gr JHP perform in ballistic gel from a Sig P365?

The Underwood +P+ averaged 1270 fps, expanded significantly, and penetrated to about 11.25 inches. It shed a considerable amount of weight, retaining 93.2gr from its original 115gr, indicating rapid energy transfer upon impact.

What were the ballistic gel results for Grizzly 9mm +P 115gr JHP fired from a Sig P365?

The Grizzly +P averaged 1268 fps, expanded well, and penetrated between 11.75 and 13.5 inches. It retained more of its original weight (around 112gr) compared to the Underwood load, suggesting a more robust projectile construction.

Is +P+ ammunition like Underwood's necessary for self-defense with a Sig P365?

The instructor questions the necessity, noting that while +P+ loads offer high velocity and expansion, they also increase recoil and muzzle flash. He suggests that standard pressure loads might offer comparable performance with less violence, making them a potentially more practical choice for some shooters.

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