5.56 vs .223: Guns & Gear|S5

Published on January 16, 2014
Duration: 1:06

This video clarifies the critical differences between 5.56 NATO and .223 Remington cartridges, emphasizing that they are not interchangeable in all firearms. It highlights that firearms marked for 5.56 can safely fire both, while firearms marked for .223 only should not chamber 5.56 due to potential safety risks. Exceptions like certain Ruger models are noted, along with the concept of hybrid chambers designed for dual compatibility.

Quick Summary

Firearms marked for 5.56 NATO can typically fire both 5.56 NATO and .223 Remington ammunition. However, firearms marked for .223 Remington only should not be used with 5.56 NATO due to higher pressure. Always check your firearm's markings and owner's manual for definitive compatibility information.

Chapters

  1. 00:04Introduction to 5.56 vs .223
  2. 00:06Are 5.56 and .223 the Same?
  3. 00:15Firearm Markings and Compatibility
  4. 00:21When NOT to Mix Ammunition
  5. 00:30Checking Your Owner's Manual
  6. 00:34Exceptions: Ruger Models
  7. 00:42Subtle Chamber Differences
  8. 00:54Hybrid Chambers for Dual Compatibility

Frequently Asked Questions

Can I shoot .223 Remington ammo in a 5.56 NATO rifle?

Yes, generally firearms chambered for 5.56 NATO are designed to safely fire .223 Remington ammunition. Always consult your firearm's owner's manual to confirm compatibility.

Is it safe to shoot 5.56 NATO ammo in a .223 Remington rifle?

No, it is not safe to shoot 5.56 NATO ammunition in a firearm specifically marked for .223 Remington only. The higher pressure of 5.56 NATO can cause dangerous over-pressure events.

How can I be sure if my rifle can handle both 5.56 and .223?

Check the markings on your firearm's barrel or receiver. If it is marked '5.56 NATO' or '5.56x45mm', it can typically handle both. If it's marked '.223 Remington' or '.223', it is generally intended for .223 only. Always refer to the owner's manual for definitive information.

Are there any exceptions to the 5.56 vs .223 rule?

Yes, some firearms are specifically designed with hybrid chambers to safely and accurately fire both 5.56 NATO and .223 Remington cartridges. Examples mentioned include certain Ruger Mini-14 and Ruger SR556 models.

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