Home Defense 5.56mm Ammo: IMI's Mk 262 Clone 77gr OTM gel test

Published on May 28, 2018
Duration: 4:45

This expert guide details the ballistic performance of IMI's 77gr OTM 5.56x45mm ammunition, a clone of the Mk 262 Mod 1. Tested with a 10.5-inch SBR, the round demonstrated deep penetration (16.2 inches), significant expansion (0.539" max), and high retained weight (53.9gr) with an average velocity of 2439.60 fps. The instructor assesses it as an outstanding home defense choice due to its wounding potential from short barrels.

Quick Summary

IMI's 77gr OTM 5.56mm ammunition, a clone of the Mk 262 Mod 1, demonstrated excellent terminal ballistics in tests from a 10.5-inch barrel. It achieved 16.2 inches of penetration, a maximum expansion of 0.539 inches, and retained 53.9 grains of weight, with an average velocity of 2439.60 fps, making it a highly effective option for home defense.

Chapters

  1. 00:00Introduction to IMI 77gr OTM
  2. 00:32Ballistic Gel Test Setup & Impact
  3. 01:03Gel Measurement and Bullet Recovery
  4. 02:15Performance Summary: Velocity, Expansion, Penetration
  5. 03:01Conclusion: Home Defense Recommendation

Frequently Asked Questions

What is the performance of IMI's 77gr OTM 5.56mm ammunition in ballistic gel?

IMI's 77gr OTM 5.56mm, a Mk 262 Mod 1 clone, achieved 16.2 inches of penetration, a maximum expansion of 0.539 inches, and retained 53.9 grains of weight in ballistic gel tests from a 10.5-inch barrel.

What is the average velocity for IMI's 77gr OTM 5.56mm from a short barrel?

From a 10.5-inch barrel, IMI's 77gr OTM 5.56mm ammunition averaged a velocity of 2439.60 feet per second during ballistic testing.

Is IMI's 77gr OTM 5.56mm suitable for home defense?

Yes, the instructor assesses IMI's 77gr OTM 5.56mm as an outstanding choice for home defense, noting its deep penetration and significant wounding potential even when fired from short-barreled rifles like a 10.5-inch AR-15.

What are the key features of IMI's 77gr OTM 5.56mm ammunition?

This ammunition is a clone of the Mk 262 Mod 1, featuring a sealed primer and an annealed case for reliability. Its 77-grain Open-Tip Match projectile is designed for accuracy and terminal performance.

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