I'm aware of the effects of gravity on bullet drop from line of sight- ie the total horizontal distance compared to the total distance and subsequent changes in sight. What I'm wondering is if a bullet is fired from a high position over a long distance, will gravity cause a change in the bullets velocity? For example, say I am shooting at a target that is 800 horizontal yards away and the vertical drop between firing point and target is 600 yards. The distance the bullet travels will be 1000 yards. (3-4-5 right triangle). If the bullet is fired at 3000 fps and the velocity was constant, it would cove the distance to the target in 1 second. the bullet drop with be 16' however due to the angle of view for the shooter, the apparent drop will be less. I haven't figured out the sine function for that- What I'm wondering is that the direction of the pull of gravity is partially in line with the direction of bullet travel, would that portion of gravity cause a relative increase in bullet velocity? If it did, the bullet would still be slowing due to air resistance, but the rate of velocity decrease would be less than if the bullet were fired horizontally. And since it seems that this reduced decrease in loss of velocity would factor in on a 1000 yard shard, just how much would it change the point of impact from the calculated point of aim?