MeekAndMild, wax paper won't absorb moisture, as wll leather. No rust. It's also unaffected by gun oils and solvents. SFAIK, some thin plastic would work just as well.
Marine 1, I sure won't argue with your system, but I tend to think in terms of a hunter's needs. That is, for my .243 and '06, I sight in for two inches high at 100 yards. That's dead on at 200 and around six inches low at 300. ("Battle sights" or "point blank" range.) I have found that for my '06 the book is pretty close, and I use two feet low at 400; four feet low at 500. All I then need to know is the fairly-exact distance, out beyond 300; and the wind. Guessing the holdover is the easy part.
, Art