357 mag vs 10mm | 75 Yards Energy Test

Published on April 25, 2026
Duration: 8:51

This video compares the ballistic performance of 10mm Auto and .357 Magnum cartridges, focusing on muzzle energy and energy retention at 50 and 75 yards. The test highlights how heavier bullets retain more energy downrange, a principle observed in both handgun and rifle calibers. The 10mm Auto demonstrated superior performance over the .357 Magnum in this specific test, even with a slight barrel length disadvantage for the 10mm.

Quick Summary

Heavier bullets retain more energy downrange in handguns, a principle observed in this test comparing 10mm Auto and .357 Magnum. A 180-grain 10mm bullet retained more energy at 75 yards than a 165-grain 10mm bullet, and the 10mm overall outperformed the .357 Magnum in this specific energy retention test.

Chapters

  1. 00:33Introduction and Wind Conditions
  2. 00:4510mm vs .357 Magnum Test Setup
  3. 00:5510mm Ammunition Loads
  4. 01:29.357 Magnum Ammunition Loads
  5. 01:50Firearm Barrel Length Comparison
  6. 02:51Shooting 10mm Rounds
  7. 03:59Shooting .357 Magnum Rounds
  8. 05:0375 Yard Data Collection
  9. 05:41Data Analysis: 10mm vs .357 Magnum Energy
  10. 06:06Heavier Bullets Retain More Energy
  11. 07:16.357 Magnum Energy Comparison
  12. 08:04Conclusion: 10mm Outperforms .357 Magnum

Frequently Asked Questions

How does bullet weight affect energy retention in handguns?

Heavier bullets tend to retain more energy downrange compared to lighter bullets in the same caliber. This is because they are less affected by air resistance and maintain their velocity better over distance, as demonstrated in tests comparing 165gr and 180gr 10mm loads.

Which caliber, 10mm or .357 Magnum, retained more energy at 75 yards in this test?

In this specific test, the 10mm Auto cartridge demonstrated superior energy retention at 75 yards compared to the .357 Magnum, even with a slight barrel length disadvantage for the 10mm pistol.

What were the muzzle energy figures for the tested 10mm loads?

The 165-grain 10mm V-Crown handload produced approximately 695 ft-lbs of muzzle energy, while the 180-grain 10mm Gold Dot handload generated around 691 ft-lbs of muzzle energy.

What were the muzzle energy figures for the tested .357 Magnum loads?

The 125-grain .357 Magnum handload yielded about 601 ft-lbs of muzzle energy, and the 158-grain .357 Magnum handload produced approximately 501 ft-lbs of muzzle energy.

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