The bullet will fall towards the earth at 9.8m/s2 regardless of its horizontal velocity. If you shot it from say 1.5m up, it would hit the ground after 0.5s. Assuming a muzzle velocity of 1700m/s, the bullet would have travelled 850m by the time it dropped 1.5m. The curvature of the earth isn't enough for it to get into "orbit" at that velocity.
So it would hit the ground about 850m away.
Last edited by my ass; Yesterday at 11:15 PM.
Last edited by mash20; 01-09-2013 at 01:56 PM.