A method of creating a rifle and scope assembly, that begins with selecting and providing a rifle having a caliber and barrel length and providing a selection of rifle scopes, wherein each one is matched to a caliber and barrel length. Then, a rifle scope that matches the caliber and barrel length of the rifle is selected from the selection of rifle scopes. The rifle scope is attached to the rifle. Then, a cartridge type is selected to be used in the rifle. A range to zero the rifle scope is selected, based on caliber, barrel length and cartridge type. The final step is zeroing the rifle scope to the selected range.