High or Low
well if you shoot at a fixed Target all the time it will not matter at all. High or Low.
i shoot for a living, you might say, and my targets are never in the same place, or same distance.
you have a longer sight window with a high mounted scope.
back up from where the bullet comes up and crosses the sight-line the first time, so you think of 1/2 inch under your sight-line, half way to 2nd crossing of the sight-line 1/2 inch over it, back to 1/2 under sight-line. is a pritty good piece.
now you lower your scope, you shorten that distance a lot.
that is a long hit-box window for just a 1/2 inch off the Cross-hairs, over or under it..
you go a low mounted scope, that window is a lot shorter.
and your guess work has to be a lot better now..
it verys a little, with what Cal. you use. but still works out about the same.
that is just one way to look at it. i sight in for a dead bulls eye at about 135 yards, 1/2 inch under is about at 80 yards, and it comes back dead on at about 225 yards 1/2 below is about 240.
so now 80 yards to 240 yard, is a hit-box window of around 160 yards 1/2 inch under or 1/2 inch under your cross-hair. not a bad way to set up if your on the move.