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What do you all think?? Is the ammo 5.56 or is it .223?
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I would think 5.56 is listed first for a reason.
Isn't there a general rule of thumb against using cartridges
other than what is actually stamped on the gun?
Example - one can shoot .38 Special in a .357, but not the other way around. Same deal for .44 Special/.44 Magnum.
My thinking would be that .223 is a secondary caliber that can be shot in a 5.56, but the other way around is not recommended