littlebighorn,
That is some good info. Years ago I came up with the way I decide on the height of a scope. Since I have several sets of rings I loosely mount a scope in some rings on the rifle. While holding the rifle in both hands I close my eyes and raise the rifle to my shoulder. Once it is comfortable I open my eyes. If I see the top of the scope I need higher rings. If I see the bottom of the scope I need lower rings. From that time on I have been using mediums and high rings.
There is a caveat, though. I hold all my rifle like I would a BB gun; even my .375-8Rem Mag. I don't try to get a hard "cheek weld". I guess even when it comes to looking through a scope, I do my own thing.