Getting one inch, 5 shot groups out of stock a M-77 is going to be a challenge and it will take some work with a few combinations. For hunting purposes, especially deer, the 165 Sierra is a winner. I shoot Rem 700s in 30-06 here on the east coast, and I use the 165 grain HPBT for practice and hunting across the bean fields, I try never to exceed 300 yards in any hunting situation, it works. Now to be truthful, on a whitetail, you certainly do not need a 165, as a 150 will do the job just fine. If you like to shoot at long ranges(300-600 yards) for fun, on targets too, and for me that is how I do most of my shooting, the 165 HPBT Sierra is a nice dual purpose bullet, of-course there might be better but it is the one I like. I like them because they are usually, available, reasonably priced, and accurate. For powder selection, I use 4350, and 4895 for the same reasons, that I listed above for the choice in bullets. I use Winchester large rifle primers and either Rem or Win brass.