For those that shoot a lot at distance and have a smart phone, I would highly recommend the knight armament bullet flight app. I know it's a lot but get the 30 dollar version. It is a ballistics calculator that does all the math for you and takes into account all the variables. (Except the shooter) I use mine all the time for muzzleloader and rifle data.
Loc: Franklin County
I like to think of two lines that intersect. One line is drawn through the center of the scope reticle out to the target. The 2nd line is the centerline of the bore. The bore line is tilted upward to compensate for the effect of gravity on the bullet causing it to begin falling the instant it leaves the bore. If the 1st line(scope centerline) starts out higher up, it definitely effects sight-in distances. A higher mounted scope will give less mid-range rise for a given sight in distance. But go too high and you have to lift your head off the stock which hurts your shooting.
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