Ken Campbell Iowa
21 September 2014
here's what i would do: get a set of calipers ( ebay or harbor freight for $12 ) then measure how far an adjustment screw moves for exactly one turn.
the impact change per turn will be magnified by the ratio of the distance between the mounts to the target . example: for 100 yards ( 300 ft or 3600 inches ) if the mounts are 12 inches apart, the impact will be 300 times the travel of the adjust screw. as a guess, your mounts are 8 inches apart, so the impact will change 450 times your adjustment travel. if you move the adjust 0.001, the crosshairs will move 0.45 inch at 100 yards. touchy, heh ? makes ya wonder how we ever hit anything at 400 yards !!
or you could just shoot a 10 shot group, move an adjust screw a half turn and see how far it moves ...
or if you have a rifle vice and a helper person, , mark the crosshairs spot on a target at 100 yards, the move the adjust screw 1 turn and mark that spot on the target.
or, ship that 44 1/2 to me, i will calibrate the scope and get it back to you in a couple three years ... ( g ) .
there is a 44 stevens running around at gun shows in no. iowa ...$400 but it's been modified .. a friend bot it as a proclaimed 44 1/2 but when i told him it was a glorified stevens favorite he ” convinced ” the seller to take it back. it originally was a 25 rimfire but was butchered into something else. still would be a fun project if i didn't have about 37 of them lined up already.