Lighten Up!....Underwood 155 Grain 10mm Self-Defense AMMO Test. This Stuff Packs a Punch!

Published on January 6, 2024
Duration: 11:48

This expert-level review details the performance of Underwood 155 Grain XTP 10mm ammunition fired from a Glock 20 Gen 4. The test involved ballistic gelatin with heavy clothing and t-shirt barriers, alongside velocity measurements using LabRadar. The ammunition demonstrated exceptional velocity, exceeding advertised claims, and impressive terminal performance with significant expansion and disruption, though penetration was slightly less than the speaker's ideal.

Quick Summary

Underwood 10mm 155 Grain XTP ammunition fired from a Glock 20 Gen 4 achieved an average velocity of 1500.10 ft/s. Ballistic gelatin tests showed excellent terminal performance with significant expansion and disruption, penetrating 12.5 inches through heavy clothing and 13 inches through a t-shirt, making it a highly recommended round for self-defense.

Chapters

  1. 00:00Range Setup and Weather
  2. 00:1610mm Ammunition Test Introduction
  3. 00:45Underwood 10mm Ammunition Details
  4. 01:21Velocity and Energy Calculations
  5. 01:42Firearm Used for Testing
  6. 01:56Velocity Test Setup and Results
  7. 02:28Muzzle Velocity Readings
  8. 02:53Average Velocity and Ballistics
  9. 03:36Predicted Terminal Performance
  10. 03:45Gelatin Test - Round 1 (Heavy Clothing)
  11. 04:20Round 1 Impact and Observation
  12. 04:45Gelatin Test - Round 2 (T-Shirt Only)
  13. 05:06Round 2 Impact and Observation
  14. 05:23Gelatin Test Results Summary
  15. 06:35Penetration Depths
  16. 07:04Projectile Inspection and Expansion
  17. 07:33Recovered Projectile Analysis
  18. 08:17Projectile Weight and Size
  19. 09:01Overall Performance Assessment
  20. 09:30Concluding Remarks on Ammunition
  21. 10:17Rant on 10mm Ammunition Standards
  22. 10:57Viewer Engagement and Call to Action
  23. 11:24Channel Support and Future Content

Frequently Asked Questions

What was the average velocity of Underwood 10mm 155 Grain XTP ammunition fired from a Glock 20 Gen 4?

The Underwood 10mm 155 Grain XTP ammunition achieved an impressive average velocity of 1500.10 ft/s when fired from a Glock 20 Gen 4 with a 4.6-inch barrel, exceeding the advertised speed.

How did Underwood 10mm 155 Grain XTP ammunition perform in ballistic gelatin tests?

In ballistic gelatin tests, the Underwood 10mm 155 Grain XTP demonstrated excellent terminal performance, causing massive disruption and significant expansion with minimal fragmentation. Penetration depths were recorded at 12.5 inches through heavy clothing and 13 inches through a t-shirt.

What is the recommended use for Underwood 10mm 155 Grain XTP ammunition based on this test?

Based on its performance, the Underwood 10mm 155 Grain XTP is highly recommended for two-legged defensive scenarios due to its excellent expansion and energy transfer. It is also considered suitable for hunting, though slightly deeper penetration would be ideal for larger game.

What firearm was used to test the Underwood 10mm 155 Grain XTP ammunition?

The Underwood 10mm 155 Grain XTP ammunition was tested using a Glock 20 Gen 4 pistol, which features a 4.6-inch barrel and is a common platform for 10mm firearms.

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