Well, after close to 100 rounds, a lot of stress, and a few more gray hairs I have figured out my .223 and its malfunction. This rifle has the worst case of clean barrel syndrome I have ever seen. My 270 suffers from CBS too but it only takes one fouling shot to bring it in. This .223 takes about 6 shots to bring it in but I'm on to it now. After fouling it this morning I fired several different loads and I've found the load it likes. For a factory rifle with no modifications I'd call a .483" group at 100 yards good enough! Thanks to everyone for all the advice and support. Now I've got to load up some more rounds, get her sighted in, and get ready for some serious 'yote busting in Wyoming!