You have it figured out at 10 and 15....you can aim right on. But at 25 yards you need to figure out how high you have to aim when taking a 25 yard shot. Everybody's rig is differant! If you're going to shoot to 30, you need to practice and learn how high to aim when taking a 30 yard shot. After 30 yard one pin gets alittle more difficult.

Good Luck!