MMK, the stuff SouthernAmmo has is/was better, it was WCC/IMI/LC/TW ammo. They had 3 grades - std. .223 for $116 (now $104), slightly tarnished originally for $104 (sold out apparently - I had some of this, only 5% was deeply tarnished) and the just now listed 'slightly dented'. All ammo came in a .50cal. ammo can.
The slightly tarnished ammo I got from SouthernAmmo was clean and customer service was friendly. At least with SouthernAmmo they tell you what your're getting right up front. The stuff from RGuns.net was dusty/powdery like it had already been run through a tumbler but yet some was still tarnished and some rounds were dented. The biggest thing was every round had to be cleaned by hand to prevent the grit from possibly gumming up my rifle or causing chamber damage.