There is almost a best of both worlds when it comes to shooting .223 or 5.56 ammo, its just not as widely known or used. Welcome .223 Wylde Chambers, which are a .223 chamber which exceeds the standard pressure amount a .223 can handle all the way up to the 5.56 pressure.

This makes shooting a 5.56 out of the .223 Wylde chamber safe, which is is not if it is not a Wylde chamber. 

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