[gwpercle]

I mount the scope base on the rifle . Using the holes already drilled and tapped.
Place the scope in the bottom rings.
Attach top rings and screw together . Not real tight
Adjust scope back and forth for proper eye relief .
Adjust for vertical by sighting onto a buildings corner across the street , twist the scope left and right to get the vertical cross hair to line up with the buildings corner while holding the rifle in your regular off hand or bench shooting position .
The building corner will be vertical and the building's fascia will be horizontal, when they match up...you got it !
No level involved .
Just make sure the people across the street don't see you pointing a rifle at their building... lots safer to use the barn on your property if you can... Living in the country I tend to forget how city folks get all upset when they see folks with a rifle.... Maybe this ain't the best way for city dwellers to scope in a rifle !!!!!
Gary