We Test The US Military's Newly Adopted .277 Fury Round

Published on April 28, 2024
Duration: 17:40

This expert-level analysis of the US Military's new .277 Fury round and the Sig Sauer M7 rifle, presented by Garand Thumb, details extensive testing. It covers ballistics, terminal effects, accuracy, and armor penetration, providing critical data for understanding this new military standard. The assessment highlights the round's significant terminal ballistics and flat trajectory, while also noting limitations against Level 4 armor with specific projectile types.

Quick Summary

The US Military's new .277 Fury round, fired from the Sig Sauer M7 rifle, averages 3,060 fps with high consistency. It demonstrates impressive terminal ballistics, creating large wound cavities and shattering bone, and offers a flat trajectory for long-range accuracy. However, standard projectiles may not penetrate Level 4 armor, requiring specialized AP rounds for such threats.

Chapters

  1. 00:00Introduction to M7 and .277 Fury
  2. 02:18.277 Fury Round Specifications
  3. 02:58Velocity Testing
  4. 03:57Ballistics Gel Performance
  5. 05:55Armor Penetration Test
  6. 07:35Human Analog Testing
  7. 10:34Accuracy and Long-Range Performance

Frequently Asked Questions

What is the muzzle velocity of the US Military's new .277 Fury round?

The .277 Fury round, tested with a Garmin Xero C1 Pro chronograph, averages approximately 3,060 feet per second (fps) with a very low standard deviation of 2.7 fps, indicating high consistency in manufacturing and performance.

How does the .277 Fury round perform against body armor?

During testing, a Level 4 ceramic armor plate stopped the 113-grain solid copper TSX projectile of the .277 Fury round. This suggests that while the round has high energy, an armor-piercing (AP) variant would likely be necessary to defeat such protection.

What are the accuracy and long-range capabilities of the Sig Sauer M7 with .277 Fury ammunition?

The Sig Sauer M7 rifle demonstrated accuracy around 1.8 MOA in testing. At longer distances (550-700 yards), the .277 Fury round exhibits a very flat trajectory, requiring significantly less hold-over compared to calibers like 5.56mm or .308 Winchester.

What is the terminal ballistics performance of the .277 Fury round?

In ballistics gel, the 113-grain copper projectile creates a substantial temporary wound cavity and significant energy transfer. Testing on a ballistics dummy showed complete shattering of bone structures and extreme terminal effects, particularly in comparison to 5.56mm.

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