I am still in a learning curve myself when it comes to stuff beyond 700 yds.
But, what I can tell you is to check your gun when you get out here. A good friend just recently brought out his new custom rifle
. He had it zero'd at 100 and drops confirmed at 300 and 600 yds at home.........they were spot on.
When he got here (we're still assuming that the rifle scope made the journey safely) he was no longer zero'd at 100, but 3/4 moa high at 100. We ended up having to play with velocity and make other changes to the program to make it match the "real world" drops once he got out here to Wyoming. We shot out to 950 yds on paper and saw some big differences between the program drops and actual drops on some days. Some days they matched.....still confused on that one.
I guess I have been truly blessed by being able to shoot at the range and then go hunt at the same altitude and same conditions basically.
Best of luck to you.