.223 From a 5.56 Chambered AR-15! Is There a Difference? 100 Yard Accuracy Group Testing!

Published on July 17, 2022
Duration: 9:06

This video details a 100-yard accuracy test comparing four different .223 Remington ammunition types fired from a 5.56 NATO chambered AR-15. The Ruger MPR with an 18-inch barrel and 1:8 twist was used. The test aimed to see how various bullet weights and types performed, with the 69-grain PPU hollow point boat tail yielding the best group size.

Quick Summary

In a 100-yard accuracy test using a 5.56 NATO chambered AR-15, .223 Remington ammunition performance varied. The 69-grain PPU hollow point boat tail and 77-grain Sierra X-Tac match bullets yielded the best results, with groups around 1.7 inches, while 55-grain loads were less accurate.

Chapters

  1. 00:00Introduction & Setup
  2. 00:45Ammunition Overview
  3. 01:38100 Yard Target Setup
  4. 02:21Accuracy Test Predictions
  5. 02:39Winchester White Box 55gr FMJ Test
  6. 03:04Frontier 55gr HP Match Test
  7. 03:40PPU 69gr HP Boat Tail Test
  8. 04:16Sierra 77gr X-Tac Match Test
  9. 04:57Group Measurement & Analysis
  10. 06:43Conclusion & Rifle Preference

Frequently Asked Questions

What is the difference between .223 Remington and 5.56 NATO when fired from a 5.56 NATO chambered AR-15?

While a 5.56 NATO chambered AR-15 can safely fire .223 Remington ammunition, accuracy can vary. This test showed that the rifle performed differently with .223 loads compared to 5.56 NATO, with specific .223 weights like 69gr and 77gr yielding better groups.

Which .223 Remington ammunition performed best in the 100-yard AR-15 accuracy test?

The 69-grain PPU hollow point boat tail ammunition achieved the tightest group at 1.7 inches. The 77-grain Sierra X-Tac match bullet also performed very well, measuring approximately 1.69 inches, surprisingly outperforming some lighter loads.

What rifle and optic were used for the .223 Remington accuracy test?

The test was conducted using a Ruger MPR rifle featuring an 18-inch barrel with a 1:8 twist rate and a rifle-length gas system. A UTG Accu-Shot 1-8x LPVO was used for aiming at the 100-yard distance.

Did the tested .223 Remington ammunition perform as well as 5.56 NATO in the AR-15?

According to the video, the tested .223 Remington ammunition did not achieve the same level of accuracy or tight groups as the 5.56 NATO ammunition previously tested with the same rifle. The rifle seemed to prefer the 5.56 NATO loads more.

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