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Yes. You can read about it here.Thanks, brother. Can I ask, are you able to use .223 ammo on a 5.56 rifle without any issues?
So, can a rifle chambered in 5.56 NATO shoot a .223 bullet?
Yes, a .223 Remington bullet can be fired safely from a rifle chambered for 5.56 NATO. The reason for this is because 5.56 rounds have a higher chamber pressure at around 58,000 psi compared to the .223 Remington which has a chamber pressure around 55,000 psi. So the rifle chambered in 5.56 NATO will be able to withstand the .223 Remington ammunition.

Can a 5.56 Rifle Shoot .223 Ammunition? Vice Versa & Everything Else You Need To Know - Tactical Gear Guy
Before we get into this article, for the sake of safety, use the designated ammunition stamped on the barrel of your firearm. This will ensure the longevity
