My scope (center line through tube) is about 2 inch higher than the center line of the barrel. So in an ideal world if i had the scope turrets in neutral position (0) and no bullet drop (i assume I pretty much could neglect bullet drop at 50 yards) my POI should be 2 inch below. Therefore i would (at 50 yards) bring my elevation 4 clicks (1/4 MOA per click) UP to compensate. I assume that 4 clicks up will bring the cross hair actually down, which will actually make me move the mussel up to compensate.
Most people cant find zero(center) on there scope if they had to. They might be able to go left go right and count back to middle. Repeat up and down etc... Thats not "zero"

Follow what Mr Furious told you but start at 25 yds. (16 clicks per inch)Get it 1.5 inch low at 25 yards and walk it out 50 then 100 and on. If it continues moving towards point of aim as you walk it out to 50 then 100 you are in good shape. If not you have a problem.

(200 it wll be 1 lick per half inch, 300 is 1 click for 3/4 inch..... )