Well, my 223 Ultra still doesn't like the WWB stuff, but it loves Black Hills 40gr NBT, Ultramax 40gr NBT, and Ultramax 52gr HP about equally. it's all remanufactured stuff. The Black Hills is the leader by a slight margin so I ordered a bunch.
Not bad at all for a "junk" rifle. I had guys on either side of me with Rem 700's and Leupold scopes etc that were eyeballing my NEF w/Simmons scope and looking at my targets with drool pooling up in their mouths. But, they were all too proud to inquire about it. None of them were even shooting MOA with their fancy rifles. Ahhh... That was fun!