Here's the load I am using in my Ruger M77-MKII;
Remington Brass
Federal GM210M large rifle primer
Barnes 100 grain TSX-BT
Ramshot Hunter - 46.5 grains
COL 2.800", Avg Velocity is 2900 fps
MOA average load
My Ruger is cantankerous; tried WIN 760, IMR4350, H4350 and Re22. Despite some promising groups I couldn't get it to shoot well consistently. I read about the combination above here on the fire and in a magazine article by John Barsness. Tried it and it works consistently in my M77. Hope your Ruger is more user friendly than mine (by the way, I only had trouble with 100 & 117 grain bullets - it shoots 75 grain bullets lights out!)
