Not sure what you are intending to say but projectiles do indeed rise. The barrels are aiming upwards to compensate for the trajectory of the bullet. They cross the same point twice. Depending on the caliber, 25 yards and 100-150 yards, the bullet will impact at the same point from level twice.

You fire a rifle with the barrel level, the bullet does drop immediately but as we are talking about normal shooting and sighting in, this is not relevant to the discussion.