I just brought this up on another forum. I have a M77 MkII .264 Win Mag, made in 2002. I'm not set back up for reloading and haven't shot it in 10 years (long story), but my pet load regularly printed 0.6"-0.8" groups at 100.
I used 67 grains of Retumbo behind a 129 Interbond, and the primer was Federal Gold Medal Match (I cant remember the numbers). I never ran it over a chrono, but it seems like Quickload called it 3100 fps (but it's been a min, dont quote me).
My thought was if you gave it a 30°-35° shoulder, it might make it a little more efficient. Same speeds, less powder, and better accuracy. Maybe I will get to try soon.
