Brad, I haven't read through your entire thread and hope I not being a wet blanket in suggesting plain old Rem, 150 Core-lokts in the factory loads or as a component. They shoot very well out of my ancient M70 and kill stuff dead when applied correctly.
Shot .277 150 & 160 Partitions for many years and they're undoubtably the gold standard for many of us but the Core-Lokts just work with boring efficiency.
