#1 Mount the scope so that both turrets are on or near "0" when you are DONE bore sighting (Biggest mistake made).
#2 At 50 yards, using a solid rest, shoot groups of 3-5 rounds.
#3 Measure the distance from the middle of the groups you just shot to the bullseye and adjust the up/down and righ/left turrets for that amount (normally 1 click = 1/4" at 100 yards) .
#4 Move out to 100 yards a repeat step #3
It's that easy........ it's getting those 3-5 shot groups tight, that is tough !!!