Probably best to ask this under ''Optics'' so the right people read it and can give you advise. If you want it mounted lower for reasons concerning cheek weld, Check out Defensive Edge, Shawn Carlock(the guy who invented the 338 Edge) makes and sells adjustable cheek welds.
I dont get out to 1k very often, most my practice is around 800 and less, so I dont need the extra height or MOA to dial up for that distance. I prefer Med. mounts with a 42-44mm obj, for my current style of shooting. Someday I'll step up to the big leagues, but my scopes are not on the same level as the Night Force or Mark 4 so I cannot help you out other than to tell you to post your question where folks in the know will see it. Good luck