16" AR-15 Velocity 5.56 vs .223 Chrono Test

Published on May 29, 2022
Duration: 3:52

This video provides a velocity test comparing 5.56 NATO and .223 Remington ammunition fired from a 16-inch AR-15. The test utilizes PMC X-TAC 5.56 and PMC Bronze .223, both 55-grain FMJ-BT, using a Caldwell Ballistic Precision Chronograph. The results indicate that velocities from the 16-inch barrel met or exceeded advertised speeds, correcting a common assumption.

Quick Summary

This velocity test compared 5.56 NATO and .223 Remington from a 16-inch AR-15. PMC X-TAC 5.56 averaged 3116.6 FPS, and PMC Bronze .223 averaged 2911.4 FPS, both meeting or exceeding advertised speeds.

Chapters

  1. 00:00Introduction and Test Setup
  2. 00:09Background and Previous Videos
  3. 00:29Ammunition Details
  4. 00:52Chronograph Setup
  5. 01:06Barrel Twist Rate
  6. 01:15Chrono Camera Setup
  7. 01:44.223 Remington Velocity Test
  8. 02:115.56 NATO Velocity Test
  9. 02:30Test Results and Conclusion
  10. 03:26Channel Support and Links

Frequently Asked Questions

What is the average velocity of 5.56 NATO ammunition from a 16-inch AR-15 barrel?

In this test, PMC X-TAC 5.56 NATO, 55 grain FMJ-BT, achieved an average velocity of 3116.6 FPS from a 16-inch barrel. This met or exceeded its advertised speed of 3120 FPS.

What is the average velocity of .223 Remington ammunition from a 16-inch AR-15 barrel?

The PMC Bronze .223 Remington, 55 grain FMJ-BT, averaged 2911.4 FPS when fired from a 16-inch barrel. This slightly exceeded its advertised velocity of 2900 FPS.

Does barrel length affect advertised ammunition velocities?

Advertised velocities are often based on longer barrels. This test with a 16-inch barrel showed that velocities can still meet or exceed advertised speeds, correcting the assumption that they would always be lower.

What equipment was used for the velocity test?

The test used a 16-inch AR-15 upper and lower receiver, PMC X-TAC 5.56 and PMC Bronze .223 ammunition, and a Caldwell Ballistic Precision Chronograph to measure muzzle velocities.

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