I recently purchased a Sako 85 in 300 Win Mag and am topping it with a VX-3i LRP. It will primary be a hunting rig but I would also like to get out to 1000 yards. I'm wondering if I might run out of adjustment on the vertical. So I'm wondering if I need a 10 or 20 MOA rail? Has anyone ran a lower Optilock ring in front? Any advise would be appreciated.