My son has a Swaro Z5 5-25 x 52 on his Sako 85 300WSM.
We have used one peice ring mounts, with ample clearance for the objective end.
One piece ring mounts come in one height, from the Sako chart on the back of the packet, they will work for objective diameters
48-56 mm, depending on barrel profile.
Two piece rings and bases offer a whole heap more options.
Google " optilock ring chart " and you'll see the charts under
" images "
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