First question:

Is 5.56x45mm generally considered better than .223?

Second:

http://www.hornady.com/store/223-Rem...ormance-match/

Does anybody have their hands on this? And is there any gelatin tests on it? Write ups etc?

How would this fair against Nosler Custom Competition BTHP 77 gr.?

Terminal Ballistics, and Accuracy wise? I'm not looking for barrier penetration.