[Psalm 73]

".223 inches diameter, 5.56 millimeter."

Oh stop - I know THAT, but ammo is not interchangeable, so why do they note them together as if they were?

[Boonie]

..".223 inches diameter, 5.56 millimeter."

Oh stop - I know THAT, but ammo is not interchangeable, so why do they note them together as if they were?

Well, yes they are interchangable...The military ball ammo (5.56) just creates a higher chamber pressure and could cause jamming...But they ARE interchangable... .