Re: Rifle shootingt left at distance
What it sounds like was happening was the cross hairs were canted and as you were putting on elevation (which would come up a little short too) you were also putting an windage. The scope levels are a great tool and really can make a difference if your rifle is canted but if the scope level itself isn't mounted perfectly level with your crosshair your rifle which appears to be level can unbeknowst to you be canted.
When I install a scope I have the gun held in a padded vise pointing out the shop door. I have a tripod with a 4' level attached out across my yard at about 50 yards and level the level. I have a small magnetic level that I made to fit inside the raceway of the actions and adjust the rifle so it's level with the raceway. I then mount the scope, remove the paralax and adjust it so the horizontal crosshair runs exactly across the top of the level. I have the magnification set so I can see about 3' of the level. Keep checking to make sure the rifle is level on the raceway. Lightly tighten the ring caps alternating from side to side and back to back. Keep checking to make sure the rifle is level and that the scope didn't roll the crosshairs out of level. Everytime I make a round of lightly tightening the ring caps a little more I re-check all my levels. Once the ring caps are all snug to spec I mount the scope level on ,and again keep checking all your levels. Now you know that the scope level is exactly level with the reticle, which is exactly level with the raceway of your rifle.