MO Archer, If you are using a scope the bullet normally starts out at -1.5 inches crosses the line of sight at about 30yds depending on velocity and distance sighted in for"0" it will make a lot of differance if you are using irons, heavy loads and light bullets also make a differance. Sabotloader and several people have put charts up on here in the past some of them were recent youall might find it quite interesting to go back and study the differances load and bullet weight make. For example the comparision of the 50/40 200gr the 250 gr and the 300gr was suprising to me. Lee