Do you have a shooter's kit installed?
Generally, the start and lower loads from the reloading manuals is where I got data from; Hodgdon and Vihtavuori online data and Hornady's manual.
I used data for the same group of powders commonly used for the M1 Garand and M1a/M14.- the various 4895s, 4064s, N135, N140, Varget.
Follow Apfeltor's guide to adjusting your shooter's kit. He has video on the "tube".
:Disclaimer: Data that follows is what I use, I don't recommend others use my data. It's just commentary on what I do. Work up your loads using published manufacturers data.
I aimed at 2400 to 2500 fps with 150 grain spitzers and 2400 with 170/175 grain boat tails. Mild loads that don't tax the old girl and close to the lowest sight setting at 100 yards for mine. Flat based shoot better in my rifle than boat tail. Spears are cheap, Sierra's and Hornadys are good, PRVI 175 grain HPBT are also very good, but flat base hunting bullets do better for me.
After experimenting, my rifle likes 44 grains of Any 4064 or N140 with 150 grain. With 175 grain, 42 grains of 4064 or N140.
Nice light and smooth cycling. My rifle seems to function best with the smallest port plug and 4064, N140 speed powders. My rifle didn't really respond well to the faster powders like TAC, H4895, and N135. Just my preference on perceived function. YMMV.