Run it on a program. What are you going to shoot it in? A 20" barrel makes it pretty tough. You may look at the 80 JLK. You can push it faster than the 80 Sierra and it has a better BC. Try some N540 or N550 powder. Don't even waste your time on the 90s unless you have a 1:6.5 twist barrel and a long chamber.
Dan
How bout a 22-243AI.....If I remember right it was about 17.5 MOA out to 1k LOL