Ive browsed several articles lately where different shooters have been struggling with getting their scope crosshairs level vs the rifle to eliminate canting the rifle. Ive seen various new tools for achieving this with all the levels and custom made jigs all involving using a spirit level etc. Ive been using a simple method for years now to do this and figured I'd share it here. Place the rifle in a vice where its certain that the rifle is level in the vertical plane. You could even use the spirit level here but its not really necessary given you have a decent vice. Place a 3/4 full glass of water out at about 25-50 yds and use the water in the glass to level the horizontal crosshair while looking through the scope. It may take a little tinkering with the gun in the vice to get it on the right level with the glass but its worth the effort. The water in the glass will always find its level and give you a simple yet effective means of setting your scope level.