For long range I feel lower is better for several reasons,shooting
prone the head position is more natural lower/comfortable, plus the
higher the scope the more error in a canted scope when changing
If you mount the scope high you may need to get a stock with an
adjustable cheek piece. If you are shooting a lot off sandbags then
the higher scope position is more comfortable.
The dimension of 1.5'' is just the average center of scope to center
of bore dimension not the hight above the barrel.
Shooting the offhand position higher is sometimes better and most
offhand (standing) rifles have both an adjustable cheek piece and
I allways recommend mounting the scope as low as possible.
This is just my recommendation but there is not a (1 best way to
mount a scope) it depends on the requirements of the type of
shooting and the shooter.
As far as light gathering unless you plan on hunting very early
or very late in the day 42mm is fine.
I hope this helps
J E CUSTOM
Last edited by J E Custom; 04-30-2008 at 09:30 AM.