RE: Line of Sight - Line of Bore Qn.
You can indeed adjust the scope so that the bullet only rises to the line of sight once. This is not reccommended because it limits your effective "aim, shoot and don't worry" zone. If you adjust so that the trajectory intersects the line of sight at 25 yds (approx) rises above and then falls back through the line at around 100 yds, you will be about 1 1/2 in high at 60 yds and 2 - 3 in low at 150 yd. If your hold is steady you have 150 yds of worry free shooting. If you adjust to only touch the line of sight once, that will be around 40 - 50 yds. by 100 yds yo will be 3-4 in low and at 150 6-8 in low. Your worry free zone is now only about 80 yds. After that the ball- bullet falls like a stone and you have to think and adjust your point of aim.