Black Hills MK 262 Mod1 77gr 5.56 OTM Ballistic Gel Test (HD)

Published on May 8, 2013
Duration: 4:30

This review details the Black Hills MK 262 Mod 1 77gr OTM 5.56mm round's performance in a ballistic gel test. The ammunition, designed for military use, features a flash-suppressed propellant and sealed primers. Tested in a 16-inch PSA rifle, it achieved an average velocity of 2711 fps, demonstrating significant fragmentation and a large wound cavity in Clear Ballistics gel, indicating excellent terminal ballistics.

Quick Summary

The Black Hills MK 262 Mod 1 77gr OTM 5.56mm round averaged 2711 fps from a 16-inch barrel. In Clear Ballistics gel, it fragmented at 1.5 inches, created a large wound cavity from 5.5-12 inches, and penetrated 19 inches, demonstrating excellent terminal ballistics.

Chapters

  1. 00:15Intro: Black Hills MK 262 Mod 1 77gr OTM
  2. 01:31Test Rifle Specs: PSA 16" Mid-Length
  3. 01:46Chronograph Results: Velocity & Energy
  4. 02:15Ballistic Gel Analysis: Wound Cavity & Penetration
  5. 03:14Conclusion: Fragmentation & Terminal Ballistics

Frequently Asked Questions

What are the key features of Black Hills MK 262 Mod 1 77gr OTM ammunition?

The MK 262 Mod 1 features a 77gr Open Tip Match (OTM) projectile, flash-suppressed and temperature-stable propellant, and crimped, sealed primers for enhanced reliability and long-term storage. It's designed for military use and stability.

What was the average velocity and energy of the Black Hills MK 262 Mod 1 77gr OTM from a 16-inch barrel?

From a 16-inch Palmetto State Armory rifle, the Black Hills MK 262 Mod 1 77gr OTM averaged 2711 feet per second (fps), generating approximately 1256 foot-pounds of energy.

How did the Black Hills MK 262 Mod 1 77gr OTM perform in ballistic gel?

The 77gr OTM bullet showed fragmentation starting at 1.5 inches, created a large wound cavity between 5.5 and 12 inches, and achieved a maximum fragment penetration of 19 inches in Clear Ballistics gel.

Why does OTM ammunition like the MK 262 Mod 1 fragment?

Fragmentation in OTM bullets typically occurs because the bullet yaws and tumbles upon impact. The cannelure, a groove near the bullet's base, can act as a weak point, causing the bullet jacket and core to separate.

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