So. I just recently learned what is probably common knowledge to most of you. .223 has a few thousandths shorter neck than 5.56 and, subsequently, lower pressures. (I knew the 223 was a lower pressure cartridge, but I didn't know why.) This leads me to the question of which cases should one use to reload with. I'm on the fence on reloading this cartridge. I'm told that the 223 is actually more accurate than the 5.56, generally speaking. (And from the little bit of 5.56, both 55 and 62 grain, that I've shot, it has all been less than stellar in accuracy.) SO...can I load 223 cartridges, using 223 data, into 5.56 brass (range brass pick-ups. My range is literally carpeted with the stuff; it's actually annoying.) and expect acceptable results? (Obviously, I wouldn't load using 5.56 data into a 223 case.) I'm just toying with the idea of loading one or the other (my gun is chambered 5.56), so just trying to figure out options.