For factory ammo, my rifle liked Federal Gold Medal Match.
I can often find it on sale for $20 a box and the last 2 times I bought some I bought from PSA for $19 a box . At that price and really $25 a box your not going to find better match grade ammo then Federal GMM for target shooting . It is not a hunting round because they use Sierra MatchKing bullets
This is a 1.35" group at 300yds using 168gr GMM
And how about this 100yd 3 shot group