Is Quality Ammo, Quality? AAC vs Phantom Defense vs IMI vs Hornaday- Testing 5.56 77gr Acc/Vel

Published on October 19, 2025
Duration: 11:03

This video compares the accuracy and velocity of 77-grain Open Tip Match (OTM) ammunition from AAC, Phantom Defense, and IMI, tested in both 16-inch and 11.5-inch AR-15 barrels. The presenter also briefly touches on 55-grain ammunition for comparison. The testing focuses on group size and muzzle velocity, providing data points for each ammunition type across different barrel lengths.

Quick Summary

This video compares AAC, Phantom Defense, and IMI 77-grain 5.56 OTM ammunition for accuracy and velocity using 16-inch and 11.5-inch AR-15 barrels. AAC and Phantom Defense grouped under 1.5 inches from the 16-inch barrel, while IMI Razor Core showed superior accuracy from the 11.5-inch barrel.

Chapters

  1. 00:00Introduction: Ammo Comparison
  2. 00:3555 Grain Test (16-inch Barrel)
  3. 01:27Phantom Defense 77 Grain Test (16-inch Barrel)
  4. 02:14AAC 77 Grain Test (16-inch Barrel)
  5. 03:03IMI Razor Core 77 Grain Test (16-inch Barrel)
  6. 03:3755 Grain Test (11.5-inch Barrel)
  7. 04:27AAC 77 Grain Test (11.5-inch Barrel)
  8. 05:20Phantom Defense 77 Grain Test (11.5-inch Barrel)
  9. 05:51IMI Razor Core 77 Grain Test (11.5-inch Barrel)
  10. 06:48Results: 16-inch Barrel Accuracy
  11. 08:26Results: 11.5-inch Barrel Accuracy
  12. 09:37Velocity Loss Discussion
  13. 10:06Final Thoughts & Training Advice

Frequently Asked Questions

What 77-grain 5.56 ammunition was tested for accuracy and velocity?

The video tested 77-grain Open Tip Match (OTM) ammunition from AAC, Phantom Defense, and IMI Razor Core. It also included a brief comparison with 55-grain ammunition.

What barrel lengths were used for the 77-grain ammunition testing?

The 77-grain ammunition was tested in both a 16-inch barrel and an 11.5-inch barrel AR-15 platform to evaluate the impact of barrel length on performance.

Which 77-grain ammunition performed best in terms of accuracy from a 16-inch barrel?

From a 16-inch barrel, AAC 77gr OTM and Phantom Defense 77gr OTM both grouped under 1.5 inches, with AAC showing slightly better consistency. IMI Razor Core had a larger group from the 16-inch barrel.

How did the 11.5-inch barrel affect the performance of the 77-grain ammunition?

From the 11.5-inch barrel, IMI Razor Core 77gr achieved a tighter group of approximately 1.25 inches, outperforming the other 77gr rounds tested from the shorter barrel.

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