10mm vs 357 Magnum vs Ballistic Gel

Published on November 20, 2017
Duration: 10:10

This ballistic gel test compares 10mm and .357 Magnum calibers using Underwood Ammo. The .357 Magnum 158gr achieved deep penetration (25.5"), while the 125gr fragmented early (17"). The 10mm 200gr offered consistent performance (22.5"), and the 150gr fragmented similarly to the .357 Mag 125gr (17.5"). Bullet recovery showed varying weight retention and expansion across all tested loads.

Quick Summary

In a ballistic gel test, the .357 Magnum 158gr penetrated deepest at 25.5 inches. The 10mm 200gr reached 22.5 inches, while the 125gr .357 Mag and 150gr 10mm fragmented earlier, penetrating around 17-17.5 inches.

Chapters

  1. 00:00Introduction: 10mm vs .357 Magnum Ballistic Gel Test
  2. 00:52Firearms & Ammo: S&W 686, Glock 20, Underwood Ammo
  3. 01:47.357 Magnum 158gr Ballistic Test Results
  4. 02:47.357 Magnum 125gr Ballistic Test Results
  5. 04:3110mm 200gr Ballistic Test Results
  6. 05:2810mm 150gr Ballistic Test Results
  7. 06:39Bullet Recovery: Weight Retention & Expansion Data
  8. 08:09Conclusion & Favorite Firearms for 10mm/.357 Mag

Frequently Asked Questions

How did the .357 Magnum 158gr perform in ballistic gel?

The .357 Magnum 158gr hollow point round created a significant wound channel and achieved a deep penetration of approximately 25.5 inches, passing through the first block and well into the second.

What were the penetration depths for the 10mm rounds tested?

The 200gr 10mm round penetrated about 22.5 inches, stopping in the second block. The lighter 150gr 10mm round fragmented significantly, reaching roughly 17.5 inches of penetration.

Which bullet retained more weight after the ballistic gel test?

The heavier bullets generally retained more weight. The 10mm 200gr retained 193.3gr, and the .357 Magnum 158gr retained 136.7gr. The lighter 125gr .357 Mag and 150gr 10mm fragmented more.

How did the expansion of 10mm and .357 Magnum bullets compare?

The 10mm rounds showed slightly larger expansion diameters. The 150gr 10mm expanded to .610" and the 200gr 10mm to .612". The .357 Magnum 125gr expanded to .560" and the 158gr to .523".

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