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What’s the difference in 5.56 and 223? Can you shoot 5.56 through a 223 efficiently?
.223 ammo can shoot in 556 chamber. 556 cannot be shot in a 223 Rem chamber. Both can be used in a 223 wylde chamber.
If it’s a 556 or 223 wylde you can shoot 556 or 223..if the chambers 223 then only shoot 223
It’s my impression after much research that the main difference is the 556 NATO chamber is cut with a longer throat to allow the firing of heavy grain weight longer bullets without the build up of pressure.
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