With the massive misconceptions and general mislabeling of .223 = 5.56, what are some true 5.56x45 rounds? I know .223 can be shot out of a 5.56 upper and bbl, albeit a little less accurate, but that the opposite doesn't hold true. What are some manufacturers that sell tried and true 5.56, even though they may or may not be labeled .223? Forgot to add, anyone have experience with this..... http://www.ammunitiontogo.com/catal...training-55gr-fmj-ammo/cName/223-556-fmj-ammo I love traditional tap in other platforms, and a cheaper training round sounds very nice. Wanna kill these ads? We can help!