Forty Is ALIVE & Well!...Underwood 155 Grain .40 S&W Self-Defense AMMO Test!

Published on July 7, 2024
Duration: 10:58

This video provides a detailed ballistic test of Underwood's 155 Grain XTP .40 S&W ammunition, fired from both a Glock 27 (3.5-inch barrel) and a Glock 22 (4.5-inch barrel). The instructor, with clear expertise in firearms and ballistics, demonstrates the ammunition's performance in gel blocks behind a heavy clothing barrier, measuring velocity, expansion, and penetration. The results indicate excellent performance for self-defense, with consistent expansion and penetration across different barrel lengths, though the shorter barrel of the G27 produces more noticeable recoil.

Quick Summary

Underwood's 155 Grain XTP .40 S&W ammunition delivered strong performance in ballistic gel tests. Fired from a Glock 27 (3.5" barrel), it averaged 1230 FPS and penetrated 18.5 inches. From a Glock 22 (4.5" barrel), it averaged 1278 FPS and penetrated 18 inches, showing excellent expansion and energy transfer for self-defense.

Chapters

  1. 00:00Introduction & Setup
  2. 00:43Underwood 155gr XTP .40 S&W Ammo Details
  3. 01:16Test Firearms: Glock 27 & Glock 22
  4. 01:52Glock 27 Velocity Test
  5. 03:20Glock 22 Velocity Test
  6. 04:45Gel Test Setup
  7. 05:21Glock 27 Gel Test Results
  8. 05:51Glock 22 Gel Test Results
  9. 06:11Gel Performance Analysis
  10. 07:10Penetration Depth Measurements
  11. 07:54Projectile Examination
  12. 09:10Conclusion & Recommendation

Frequently Asked Questions

What are the velocity results for Underwood 155 Grain XTP .40 S&W from different barrel lengths?

From a Glock 27 with a ~3.5-inch barrel, the average velocity was 1230 FPS. From a Glock 22 with a ~4.5-inch barrel, the average velocity was 1278 FPS. The manufacturer claims 1300 FPS, likely from a longer test barrel.

How did Underwood's 155 Grain XTP .40 S&W perform in gel tests behind a clothing barrier?

The ammunition demonstrated immediate expansion and excellent energy transfer. Penetration depths were 18.5 inches from a Glock 27 and 18 inches from a Glock 22, indicating effective performance for self-defense scenarios.

Is Underwood 155 Grain XTP .40 S&W suitable for self-defense?

Yes, the test results show excellent expansion and penetration, consistent across different barrel lengths. While it produces noticeable recoil from shorter barrels like the Glock 27, its performance makes it a strong contender for self-defense.

What is the difference in recoil between firing Underwood 155 Grain XTP .40 S&W from a Glock 27 versus a Glock 22?

The instructor describes the recoil from the Glock 27 (shorter barrel) as 'rowdy,' indicating a significantly more pronounced kick compared to the Glock 22 (longer barrel), which was noted as 'much more manageable.'

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