Hi, SHR970 and JimPage,
The opposite; bullet drift caused by rifling is a constant (other things can affect it), while the Coriolis Effect varies depending not on the latitude of the shooter but the latitude of the shooter and the latitude of the target as well as whether the direction of fire is due North-South or in some other direction. It is a reflection of the fact that in a long range gun, firing on a spherical, rotating globe (Earth), the difference in latitude will mean that the shooter and the target have different rotational velocities. A shooter at the Equator, firing due North, is not moving Eastward as fast as is his target in, say, Chicago. So no matter how carefully the marksman aims, he will always miss the target unless he takes the Coriolis Effect into consideration.
Weather is affected by the Coriolis Effect, which is why hurricanes coming out of the Florida area curve to the East as they move north. It is also why the continents themselves are slanted to the East in the Northern hemisphere and to the West in the Southern - look at a map of the Americas and East Asia (China-Japan) to see what the Coriolis Effect did to the earth itself.
But it won't make you miss that target on the local range.
Jim