For those imterested Olympia arms is making an ar platfrom style rifle in 22-250. Also, the one thing I have seen mentioned in load selection is the rate of twist in your barrel. If its a slower twist it will generally oerform better with a lighter projectile. I have a heavy barrel thumbhole Howa 1500 and it shot poorly with a 50gr or heavier bullet. But, when I tried the 40 gr Hornady V-max it put 4 shots in a bottle top at 200 yds.
Whatever you choose, experiment with your ammo until you are happy with the performance. No matter what yiou are chasing!! Good Luck!