Hi,
What I do with a new scope is, turn your cross hair adjusters in one direction until you come to the stop, then turn them back the other way counting the clicks until you come to the stop again, then turn them back agian until you reach half way counting the clicks, IE if the clicks from end to end is 300 then turn it back 150 clicks, and you should be in the middle, thus your cross hairs should be parallel with the barrel.
You shouldn't be far off now, just minor adjustment.
Bob.