I am having accuracy problems with my Sako 85 300 WSM. I've shot 2 differrent handloaded type bullets from it and 2 different factory loads as well. Groups range from about 1.5" - 4" @ a 100 yds. I have a 32 oz NF NSX 5 1/2 x 22 x 50 on it. Someone in another forum who has a Sako 75 WM had the same proble and swithed to Warne rings and bases and his groups went from 4" to .5". Any opinions on the Optilok system? Anyone else with similar experiences?