I just purchased a 16 power SS for an M1A with the 4th gen Aluminum mount but there are no instructions on how to use and adjust the piece. Only the mounting instructions were included. I wanted to site in for 200 meters so do you use the dots on the vertical to shoot at greater distance. Do I zero the distance turrent to zero after sighting in for 200 meters? Do you also zero the windage also? I am new at this as you can probably tell. I'm used to my PU scope on a 91\30 MN which is one step above iron sights.