Dispelling the "BU!!$#!T" - 9mm vs. .357mag in Snubbies

Published on October 10, 2018
Duration: 11:23

This guide details how to compare the ballistic performance of 9mm and .357 Magnum calibers, specifically in snub-nose firearms, based on expert analysis. It emphasizes using empirical data from chronographs and considering 'hot' loads for accurate comparisons. The analysis highlights the .357 Magnum's superior energy and potential velocity advantage, while also addressing potential reliability issues like crimp jump in revolvers.

Quick Summary

Expert ballistic testing reveals .357 Magnum significantly outperforms 9mm in snub-nose firearms. Using chronographs, tests showed .357 Magnum loads reaching velocities up to ~1370 fps, compared to ~1100 fps for 9mm. While 9mm can face reliability issues like 'crimp jump' in revolvers, .357 Magnum offers superior energy and velocity potential.

Chapters

  1. 00:00Introduction to Ballistics Testing
  2. 01:04Comparing Barrel Lengths
  3. 02:15Initial Velocity Results
  4. 03:32The Loading Fallacy
  5. 04:51Hot Load Comparison
  6. 06:31Conclusion and Reliability

Frequently Asked Questions

What is the primary difference in ballistic performance between 9mm and .357 Magnum in snub-nose firearms?

The .357 Magnum generally exhibits superior ballistic performance in snub-nose firearms, offering higher muzzle velocities, greater bullet weight potential, and increased energy compared to 9mm. This is evident even when comparing 'hot' loads, with .357 Magnum consistently outperforming 9mm in empirical tests.

What are the key firearms compared in the 9mm vs. .357 Magnum snub-nose test?

The comparison features a Smith & Wesson Model 60, a .357 Magnum snub-nose revolver with a 2.125-inch barrel, and a Sig Sauer P938, a 9mm semi-automatic pistol with a 3-inch barrel. Both are used to test various ammunition types.

What is 'crimp jump' and why is it relevant when comparing 9mm and .357 Magnum in revolvers?

'Crimp jump' occurs in revolvers when recoil pushes the bullet back into the case. This is more of a concern for 9mm ammunition in revolver platforms, as it can cause reliability issues, whereas .357 Magnum rounds are typically more robustly crimped.

What ammunition types were used to test the ballistic performance of 9mm and .357 Magnum?

The test utilized CorBon DPX ammunition, with 115gr 9mm achieving around 1100 fps and 125gr .357 Magnum reaching approximately 1200 fps. Additionally, Buffalo Bore 125gr .357 Magnum was tested, yielding velocities around 1370 fps.

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