We recently released a video on how to go this in your back yard, with firing a shot. To at least get on paper when you do get to the range for that final dial in. I mentioned a couple things. 1. a balistics chart wheich you can find below.
...and 2. A home made target that was made for 50 yards with both line of site and compensation drop points for 168gr .308. I modified it to be better suited for a red laser (watch the video to see what I mean) and it's available here to down load and print for your self if you could use it.
Good luck with your zeroing in efforts. May your projectile fly true and make it's target.
Oh and as always, God bless you, God bless America and may America bless God!