What powderburner said.
Close to the muzzle, the bullet will be below the line of sight. It will rise to intersect the line of sight (usually around 25 yds or so), then travel above it, and then drop below it again.
If you ever hunted squirrels with a rifle, sometimes you will get real close shots (like 5 yds or so), and you learn that you have to aim ABOVE them!