Just picked this off another website if that helps;
Adopt your standard prone/lie down shooting position.Prone is the best way as if you test shoot from standing or kneeling positions you waver more and it's harder to do a "true test".
Make sure your windage and elevation turrets are ready for adjusting i.e., caps removed.
[*]Draw 1 or 2 small dots on a piece of cardboard about 6.5cm apart vertically.
There's no precision to this step. You just want enough room on the target so no shots are lost. At 10 feet, they can't go too far.
If your scope has parallax adjustment, adjust it a