1) whether we like it or not, guns should run with ALL available ammo. Some steel case is terribly weak, and probably too low of pressure. Other than that crap, all ammo marked 223 or 5.56NATO must run.
Not true........the AR was not designed to run with steel cased ammo and yes it is because of the tighter tolerances which does make it more accurate. Sorry folks there's no free lunch. This is where I will compare it to the AK because the next person posting will point out how a AK has no problem running steel cased ammo. Well for arguements sake I will agree that the AK will go bang with every trigger pull, but its not going to be near as accurate as the AR.