40 S&W vs 10mm vs Ballistics Gel

Published on October 7, 2017
Duration: 6:56

This video compares the ballistic performance of 40 S&W and 10mm using Underwood Ammo 180gr JHP rounds fired from a Glock Gen 4 Model 20. Both calibers penetrated the 16-inch gel block, but the 10mm exhibited significantly more violent expansion and a wider wound channel (0.912 inches) compared to the 40 S&W (0.859 inches). The 10mm also retained slightly less weight (170.5 gr) than the 40 S&W (178.6 gr), indicating greater energy transfer.

Quick Summary

In a ballistics gel test, both 10mm and .40 S&W Underwood Ammo 180gr JHP rounds penetrated 16 inches. The 10mm showed more violent expansion and a wider wound channel (0.912 inches) than the .40 S&W (0.859 inches), retaining 170.5 gr vs 178.6 gr.

Chapters

  1. 00:00Introduction & Setup Change
  2. 00:52Underwood Ammo Overview (180gr JHP)
  3. 01:19Glock Gen 4 Model 20 Used
  4. 01:36.40 S&W Ballistics Test Results
  5. 02:3010mm Ballistics Test Results
  6. 03:35Side-by-Side Comparison & Measurements

Frequently Asked Questions

How did the 10mm and .40 S&W compare in ballistics gel penetration?

Both the 10mm and .40 S&W Underwood Ammo 180gr JHP rounds penetrated the full 16-inch ballistics gel block when fired from a Glock Gen 4 Model 20. Both rounds hit the wooden backstop behind the gel.

What were the key differences in bullet expansion between 10mm and .40 S&W?

The 10mm round exhibited significantly more violent expansion and mangling compared to the .40 S&W. The .40 S&W expanded uniformly like a flower, while the 10mm showed more dramatic deformation.

What were the measured wound channel widths for the .40 S&W and 10mm?

Using digital calipers, the widest part of the .40 S&W wound channel measured 0.859 inches. The 10mm wound channel measured slightly wider at 0.912 inches.

How much weight did the .40 S&W and 10mm bullets retain after firing?

The .40 S&W projectile retained 178.6 grains of its original weight. The 10mm projectile retained 170.5 grains, indicating slightly less weight retention but potentially more energy transfer.

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