It may take more time and more ammo, but it's a more precise method because you are only concentrating on one axis at a time and it's easier to hold steady that way. Once you try it you will see what I mean.
I thank you too Paul, I have two 308s that I recently switched the scopes on so I need to re-sight both in, I'll try your method, it makes alot of sense.
As for the rifleman, ah forget it, not worth my time or energy to reply to him.