I agree with Coyotejoe.
Sight in for 50 yards dead center, and you will be about 1.5 to 2 inches high at 25 yards. A range with a big sand backstop is great for practicing at longer ranges. Pick one ammo and stick with it for trajectory familiarity. Also, you will find that by holding your front sight a bit over the rear sight, you can hit football sized rocks at 100 and 150 yards.