Favorite caliber for rifle, good choice. What are you shooting at? Mine are used primarily for hunting and are fed a steady diet of 180-gr TSX and TTSX. That said, when the task is range work, they get 208 Amax and 175 sierra matchking hand loads. Since you have the caliber, now you need to pick the target and the shot it will most often be called upon to deal with, then go from there. Short of that, it is a good all-rounder and no one can give you much more than all-around ammo suggestions.
Last thought: don’t set up a 1000 yard gun when it MIGHT one day take a long shot. Set the gun up for the shot it will take. I see so many nitwits at the 100 yard line bragging about their 1000 yard gun that they can’t even shoot well at 1/10th that range.