You looking for a reduced recoil load?...or just a load to seat some 150's on top of? Since you're shooting a bolt gun, you have zero constraints on powder and brass...therefore any accuracy load for hunting or whatever will work. If you want something highpower specific, there's good data out there for the Sierra 2155 and 2156 bullets that will transpose readily to a 150. If rapid fire is part of your equation, I'd make sure you size your brass for easy and reliable cycling and load on the mild end of the spectrum.
A little more about goals and expectations would be helpful.
Last edited by ChrisF; 06/26/20.
