The Coriolis Effect is a myth. Snipers don’t really take it into account. Railguns are high-speed electromagnetic weapons that shoot a target accurately 100 miles away. They don’t account for the Coriolis Effect.
We can debunk the Coriolis Effect easily by firing a weapon straight into the air. If earth were moving, the bullet would fall in the opposite direction of earth’s spin. But since earth is stationary, the bullet falls close to the gun.