Big SPEED and POWER From 9MM!

Published on February 10, 2023
Duration: 10:24

This video details a ballistics test of Underwood loaded 9mm +P+ ammunition featuring 115-grain Nosler jacketed hollow points. The test compares performance from a 3-inch Taurus GX4 and a 4.5-inch P80 (Glock 17 equivalent) through a clothing barrier and into ballistic gel. The ammunition demonstrated significant velocity and expansion, with the longer barrel yielding higher speeds and slightly deeper penetration.

Quick Summary

Underwood loaded 9mm +P+ 115-grain Nosler jacketed hollow points achieved average velocities of 1278 fps from a 3-inch Taurus GX4 and 1381 fps from a 4.5-inch P80. Gel tests showed the GX4 projectile penetrated 13.75 inches with .600" expansion, while the P80 projectile penetrated 15.125 inches with .485" expansion and more fragmentation.

Chapters

  1. 00:00Introduction and Setup
  2. 00:09Testing 9mm +P+ Ammunition
  3. 00:34Underwood 9mm +P+ 115gr Nosler JHP Details
  4. 01:03Firearms Used: Taurus GX4 & P80
  5. 01:21Chronograph Testing: Taurus GX4
  6. 02:41Chronograph Testing: P80
  7. 03:48Gel Testing: Need for Speed
  8. 04:08First Gel Test Results (GX4)
  9. 04:26Second Gel Test Results (P80)
  10. 04:53Gel Test Analysis
  11. 05:02Gel Performance: GX4 vs. P80
  12. 06:01Penetration Measurements
  13. 06:18Wound Channel Closer Look
  14. 06:42Projectile Examination
  15. 07:28Projectile Measurements
  16. 07:51Expanded Diameter Measurements
  17. 08:12Conclusion: Underwood 9mm +P+
  18. 08:23Trigger Slap Discussion
  19. 08:54Final Thoughts and Recommendations
  20. 09:29Viewer Engagement
  21. 09:46Affiliate Links and Support
  22. 10:15Upcoming Tests and Sign-off

Frequently Asked Questions

What were the average velocities for Underwood 9mm +P+ 115gr Nosler JHP from different barrel lengths?

From a 3-inch Taurus GX4, the ammunition averaged 1278 feet per second. Fired from a 4.5-inch P80, the average velocity increased to 1381 feet per second, demonstrating the impact of barrel length on performance.

How did the Underwood 9mm +P+ 115gr Nosler JHP perform in ballistic gel after passing through a clothing barrier?

The projectile from the 3-inch GX4 penetrated 13.75 inches and expanded to about .600 inches. The projectile from the 4.5-inch P80 penetrated 15.125 inches and expanded to about .485 inches, showing more fragmentation.

What is the difference in projectile integrity between the 3-inch GX4 and 4.5-inch P80 with this ammunition?

The projectile from the GX4 retained its full 115-grain weight and showed less fragmentation. The projectile from the P80 shed significant lead, weighing only 93.2 grains, indicating more aggressive expansion and fragmentation.

Does the Taurus GX4 handle Underwood 9mm +P+ 115gr Nosler JHP ammunition well?

While the ammunition performed well ballistically from the GX4, the instructor noted significant trigger slap, indicating the powerful nature of the +P+ rounds for the compact pistol. However, he would still consider it for defensive carry.

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