To find zero with a scope, you need to align the reticle (the crosshairs or aiming point in your field of view) so that your point of aim matches your point of impact. This is typically done at a specific distance that you choose, often 100 yards. Start by setting up on a firm rest such as shooting bags or a bench, not attempting this off-hand or unsupported. Visually bore sight your scope if possible and adjust the turret so that the “0” aligns with the indicator mark on your scope. Remember, the magnification level on your scope does not influence this process, so use whatever level you're most comfortable with.