I have a Sako Mannlicher in 375. Best rifle I have owned in 30 years of shooting. It will cluster a cloverleaf at 100 yards with the right load. For me that is 70 grs. RL15 with a CCI 250 Primer in a WW case with a Speer 270 grain bullet. It goes out at a little over 2600 fps. I also shoot a 235 grain Speer bullet with IMR 4064 powder - forget the amount - and get 1 1/4 inch groups at 100 yards. My rifle was heavier than I anticipated but it does help keep recoil down. The 235 and 270 grain bullets both hit at the same spot on a 100 yard target.
I had to search for a few years to get my rifle. They will truly pry it from my cold fingers. I was thinking of getting it diamond coated, but am still deliberating. Best of luck with yours.
CF