In the movie The Shooter starring Mark Wahlberg, it is claimed that coriolis forces need to be taken into consideration when taking a shot at a target 4 kilometres away. To test this statement assume the shot was taken on a flat plain on the latitude of Sydney. The shot is at a 12cm circular target 4 kilometres due south. The shooter uses an assault rifle with telescope sights and a muzzle velocity of 1000m.s^-1. Are the coriolis forces significant? If so, how far left or right must the shooter aim if he is to hit the bull's eye?