Hornady 223 Remington 55gr GMX | Ballistic Gel Test

Published on August 14, 2017
Duration: 3:40

This video presents a ballistic gel test of Hornady 223 Remington 55gr GMX ammunition fired from a 16-inch Rock River carbine with a 1:9 twist rate. The test reveals significant expansion, a large temporary stretch cavity, and a penetration depth of 21.4 inches. While the ammunition shed one fragment and had a short neck, its rapid expansion and disruption capabilities are highlighted as desirable characteristics, potentially attributed to its 'barrier blind' design.

Quick Summary

The Hornady 223 Remington 55gr GMX ammunition achieved 21.4 inches of penetration in ballistic gel, exhibiting rapid expansion and a large temporary stretch cavity. While it shed one fragment, its performance is noted for significant disruption, potentially due to its 'barrier blind' design.

Chapters

  1. 00:05Introduction and Setup
  2. 00:47Ballistic Gel Results: Penetration and Expansion
  3. 01:03Temporary Stretch Cavity Analysis
  4. 01:19Fragment Shedding Observation
  5. 01:31Tearing and Disruption in Gel
  6. 01:54Bullet Recovery and Analysis
  7. 01:57Performance Assessment and Barrier Blind Design
  8. 02:37Future Testing and Viewer Engagement

Frequently Asked Questions

What were the key ballistic performance metrics for the Hornady 223 55gr GMX in the gel test?

The Hornady 223 55gr GMX achieved 21.4 inches of penetration in ballistic gel. It also demonstrated rapid expansion, creating a large temporary stretch cavity of approximately 3x6 inches, and shed one fragment during its trajectory.

How did the Hornady 223 55gr GMX perform in terms of expansion and disruption?

The ammunition expanded very rapidly, causing significant disruption and tearing within the ballistic gel. This rapid expansion and the resulting temporary stretch cavity are considered desirable for effectiveness.

What is the significance of the 'barrier blind' claim for this ammunition?

The 'barrier blind' designation suggests the ammunition is designed to perform reliably after encountering intermediate barriers. This may explain its deep penetration and retained energy, as the design might prioritize maintaining effectiveness through obstacles.

What firearm was used for the Hornady 223 55gr GMX ballistic gel test?

The test utilized a 16-inch Rock River carbine equipped with a 1:9 twist rate barrel. This setup is standard for many AR-15 platforms chambered in .223 Remington/5.56 NATO.

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