Battle of the Bottlenecks - 357 SIG and 7.5FK vs 10mm

Published on August 26, 2022
Duration: 18:44

This video compares the ballistic performance of .357 SIG, 7.5 FK, and 10mm Auto cartridges. The 7.5 FK demonstrated superior penetration in ballistic gel, reaching 24 inches, making it suitable for dangerous game. While .357 SIG offers high velocity with manageable recoil, 10mm Auto provides more raw power and generally exceeds .357 SIG in performance metrics. The FK Brno PSD pistol chambered in 7.5 FK is noted as powerful but less practical for everyday carry due to its weight.

Quick Summary

The 7.5 FK cartridge demonstrated superior penetration (24 inches) in ballistic gel, ideal for dangerous game. 10mm Auto exceeded FBI standards (19.75 inches) with strong energy, while .357 SIG offered high velocity (2142 fps) with manageable recoil.

Chapters

  1. 00:00Introduction: Battle of the Bottlenecks
  2. 02:09Cartridge History: 10mm and .357 SIG
  3. 04:25Test Firearms: P320-X10, Glock 31, FK Brno PSD
  4. 05:57Velocity and Muzzle Energy Data
  5. 08:18Ballistic Gel Testing Comparison
  6. 10:11Final Assessment and Practicality

Frequently Asked Questions

What are the key differences in performance between .357 SIG, 7.5 FK, and 10mm Auto?

The 7.5 FK offers the deepest penetration (24 inches) and high energy (784 ft-lbs). 10mm Auto provides strong power (1354 fps, 733 ft-lbs) exceeding FBI standards. .357 SIG delivers high velocity (2142 fps) with manageable recoil but less energy (693 ft-lbs).

Which cartridge is best for self-defense based on this comparison?

For general self-defense, 10mm Auto is recommended for its balance of power and penetration exceeding FBI standards. .357 SIG is a viable option for those prioritizing high velocity and lower recoil. 7.5 FK's extreme penetration makes it less ideal for typical civilian self-defense.

What firearms were used to test the .357 SIG, 7.5 FK, and 10mm Auto cartridges?

The test featured a Sig Sauer P320-X10 for 10mm Auto, a Glock 31 for .357 SIG, and the FK Brno PSD pistol for the 7.5 FK cartridge. All were full-sized service pistols.

How does the 7.5 FK cartridge perform in ballistic gel compared to others?

The 7.5 FK cartridge achieved an impressive 24 inches of penetration in Clear Ballistics gel, significantly more than the 10mm Auto (19.75 inches) and .357 SIG (18 inches), making it suitable for hunting dangerous game.

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