I run mine to 950 with about 7" group but over 1000 the group goes crazy, not supposed to be transonic either.
Savage 26" varmint 1:9
75 Amax, 24 gr Varget, cci SR primer, 2.426" COL, ~2800 fps
What he said, but while tightening the turrets push down on them, then insert the little hex screws and tighten. If not, the air trapped inside keeps them from wanting to go all the way down.
What load are you using? My buddy has a 110 long range hunter in 308 but can't seem to get it to group small yet.
Nevermind, had to open it in Youtube to see the comment. Nice shooting tho.