Most AR-15 shooters are aware that .223 Remington and 5.56 NATO are not exactly the same, and that it’s generally considered prudent to never fire the latter in a rifle chambered for the former. Because of this, most ARs today are designed with 5.56 NATO chambers to allow the safe firing of either. Now, many rifles are available with a .223 Wylde chambering as well.
The .223 Wylde is a chamber dimension, developed by gunsmith Bill Wylde of Greenup, Illinois, that aimed to balance the differences between 5.56mm NATO and .223 Remington chamber dimensions.
Why? To understand, we need to dive a little deeper into the differences between .223 Remington and 5.56x45mm NATO.
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