Son
I load for my dad's Rem 742 using Sierra 165 and 180gr Game Kings and IMR 4064; it works great in his gun.
I asked one of the Sierra technicians about what powder to use since I would be loading for a semi auto and IMR 4064 was his suggestion. I was so pleased with the results that I've never even tried another powder in '06.
BTW, I also use IMR 4064 in my .308 with 165gr Game Kings and in .30-30 w/170gr bullets.
Maybe I'm just partial to IMR 4064.
Jack