I was have the same issue when I first got my AI PSR I found that 49 in pounds was not enough so I got a 6nm(53.1 in pounds) preset T handle torque wrench and my groups settled right in. I also use it for the AI-AT. This is with hand loads. I shot some Hornady 285 factory but the box of 20 i had could never get it to group under 1 moa at best. I am shooting Berger 300 hybrids with N570 and it groups 1/2 moa or slightly better on a good day.