Build youself a target as shown in the first image on this thread Long Range Targets
It doesn't need to be that tall but tall enough for you to hit the single target at the top @ 100 yards.
Read the article and shoot at your several distances. At each distance aim at the target at the top.
This will reveal your drops.
Use JBM to figure the BC out to your max distance.
Then dial the turrets for each distance. Make corrections as necessary.
I've been told that doing it this way will result in being off by the cosine of gravity. Thus the dialing and adjusting to check things out.
Hope this helps.
I did this once out to 1200 yds. Took all day and I was one tired little boy. It helped.