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Central Alberta | The coriolis effect has no effect on a bullet moving due east or due west. Shooting north or south, the earth turns to the left while the bullet is in the air, which makes it veer to the right. This is reversed in the southern hemisphere. Over long distances, the bullet is in the air longer, thus the greater effect and the more compensation is required. The effect is most pronounced at middle latitudes, because that's where the turning of the earth is most significant.
Artillery was calibrated years ago to account for the coriolis effect. When the British practiced artillery in the Falklands, their tables were way off. They had to revise their tables for different latitudes. Nowadays unguided projectiles are calculated by computers. There are even smartphone apps for casual shooters.
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World record rifle shot
