I'm playing with H335 recently for a customer, it's shooting sub MOA with near max loads under 50 and 55grn Vmax's, really really likes the 50 CT BST. Did sub MOA with 69smk and 75 Amax too. Hadn't used it much in 223 until this "project," but I'm very impressed so far. A few max loads have scattered on me though, but the velocities with sub-max have been good enough to not worry much about Max's.
W748 should do well for you too, but it's been a long time since I've used it. CFE 223 is one I think will be as popular as Varget in its time. 4198 and 4895 should be ok as well, although you might have issues in AR.