I'm new to long range shooting and just getting ready to bring my new rig to the range. I've got a mil/mil scope. Here's the reticle.

https://www.dropbox.com/s/htx1wvcjxl...%20pm.png?dl=0


My question is if my intentions are to hopefully get out to 600-800yrds should I zero 5 or 6 sub-tensions above the center cross to use holdover instead of dialing?