I bought a box of Federal Fusion 165 gr. ammo. They shoot the best of the three I've tried so far. I'm shooting concistant 1 1/2" three shot groups. Five shot groups were still under 2". I'd shoot a few shots and then let the barrel cool down as I shot my 280 Rem. and 223 Rem.
I'll get better groups as my back heals. It's hard to crouch and shoot off a bench. So I'm pretty happy with how my hunting rifles/carbines are shooting at this point. My 30-06, 280 and 35 Rem. are ready to hunt. As is my 223!
NYH1!