IMR 4064 and Sierra Game Kings shoot well in my pre'64 FWT .30-06 too. I am shooting a 165gr. Nosler Accu Bond, they gave slightly tighter groups than Ballistic Tip Nosler or Sierra GK in my rifle. IMR 4064 has been my go to powder in .257 Roberts and .35 Whelen
M/70's for several years now. While IMR 4350 gave good results it has been hard to find thus I will be loading IMR 4064 in my .30-06.