You do realize that just because it's "sighted in" elevation wise, for 1000 yards doesn't mean you won't still have to learn how to shoot that far, and judge windage, right?
There's no such thing as a perfect solution when long range shooting.
Having a zero and drops set and developed remotely seems doomed for failure.
I provide frequently this service for local friends. After the rifle is bedded, tuned and loads for their purpose are developed zero set they are personally involved in drop chart development.
One thing I have noticed is that initially my zero differs slightly from their zero. Then sometime during the extended range shooting zero needs reverified. Guess what? After some trigger time their zero more closely approaches my zero. Hence I suspect it may be an unreasonable expectation to send'r off and expect to be promptly competent at varying extended ranges.
Weatherby, The crew at Gunwerks (makers of the G7 ballistic rangefinder for sale here) used to offer load and turret calibration as part of an optics package, maybe they can take care of your initial setup.