well the purpose of a mildot is that hevier pellets tend to drop at range, so if your scope is zeroed for 20 yards and theres a bunny at 40 yards then you put the mil dot juts below the place where the cosshairs meet on the bunnys head and theoreticly the pellet should hit the bunnys head. sound complicated? it dose to me. it all depends on how you've zeroed youre scope. some pepole for example put rocks out on the arear they are gunna shoot at 10 yard, 15 yard, 20 yard, 25 yard, 30 yard and 35 yard so that when the bunny (for example) comes say in between 20 yard and 25 yard then that rabbit