I am working to find the "magic" load for my Ruger 77. So far I am getting good results with H4350 at around 43/44 grains (start lower) And, seated at 2.910" ( about 0.020" from the lands) these are somewhat warm loads according to some manuals. However, do not show any signs of pressure in my gun. I am getting 5-shots groups at about .8 to 1.25". Still some way to go might be able to go as far as 45.5 grains. Good Luck