Oddball!...Grizzly Cartridge 148 Grain Kodiak .357 Magnum Self-Defense AMMO Ballistic Gel Test!

Published on April 26, 2026
Duration: 14:08

This video presents a ballistic gel test of Grizzly Ammunition's 148-grain Kodiak .357 Magnum JHP. The instructor notes the unusual weight for .357 Magnum and tests it from a 3-inch S&W 686 Plus and a 4-inch Ruger GP100. Chronograph readings showed inconsistent velocities, averaging 1336 FPS from the 3-inch and 1371 FPS from the 4-inch, significantly lower than the advertised 1700 FPS. Gel testing revealed good expansion from both, with the 4-inch barrel producing more fragmentation due to higher velocity. Despite the lower-than-expected velocities and inconsistencies, the ammunition demonstrated decent performance in gel, though the instructor suggests better options exist for .357 Magnum.

Quick Summary

The Grizzly Ammunition 148 Grain Kodiak .357 Magnum JHP was tested for ballistic performance. Chronograph readings showed average velocities of 1336 FPS from a 3-inch barrel and 1371 FPS from a 4-inch barrel, with significant inconsistency. Gel testing revealed good expansion and penetration, with higher velocity from the 4-inch barrel causing more fragmentation.

Chapters

  1. 00:00Introduction & Setup
  2. 00:28Grizzly 148gr Kodiak .357 Mag Ammo Overview
  3. 01:05Firearm Selection: 3" S&W 686 Plus & 4" Ruger GP100
  4. 02:16Chronograph Results: 3-Inch Barrel
  5. 04:02Chronograph Results: 4-Inch Barrel
  6. 05:42Ballistic Gel Test: 3-Inch Barrel Firing
  7. 06:38Ballistic Gel Test: 4-Inch Barrel Firing
  8. 07:00Gel Test Analysis: 3-Inch vs. 4-Inch Performance
  9. 08:30Projectile Examination & Weight Retention
  10. 10:02Instructor's Final Verdict & Recommendations

Frequently Asked Questions

What are the key specifications of the Grizzly Ammunition 148 Grain Kodiak .357 Magnum JHP tested?

The Grizzly Ammunition 148 Grain Kodiak .357 Magnum JHP features an unusual 148-grain weight for the caliber. It is advertised with a velocity of 1700 FPS, which would equate to approximately 950 foot-pounds of energy. The projectile has a deep cavity designed for expansion.

What were the actual chronograph results for the Grizzly 148gr .357 Magnum Kodiak JHP?

Testing revealed significantly lower velocities than advertised. From a 3-inch barrel, the average velocity was 1336 FPS. From a 4-inch barrel, the average velocity was 1371 FPS, showing considerable inconsistency and a large extreme spread.

How did the Grizzly 148gr .357 Magnum Kodiak JHP perform in ballistic gel?

In ballistic gel, the ammunition showed good expansion. The 3-inch barrel produced about 17.75 inches of penetration with minimal fragmentation, while the 4-inch barrel achieved about 18.25 inches with significant fragmentation and material loss, indicating velocity's impact on performance.

What is the instructor's overall opinion on the Grizzly 148gr .357 Magnum Kodiak JHP?

The instructor found the ammunition's performance inconsistent and the velocity lower than expected for .357 Magnum. While it performed adequately in gel, they believe there are better, more powerful .357 Magnum options available on the market for self-defense or hunting.

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