For those that participated or read/reviewed this Thread, I've spent hours researching Coriolis force and the vertical deflection (drift) Coriolis imparts to bullet flight. As a consequence, I've edited/corrected my Post #2, and Post #5 in this Thread. You might want to re-visit and re-read those two Posts. The correction is strictly with respect to vertical deflection due to Coriolis drift, and the magnitude of that vertical drift at the equator versus at either of the poles. Vertical deflection is maximum at the equator. Vertical deflection is null at either Pole.
This is contrary to my original posts.
At the equator, shooting 210 Berger VLDs out of my 300 Win Mag, vertical deflection due to Coriolis force would shift my POI ~3.7" high shooting due east, and ~3.7" low shooting due west. At my Latitude of 60 degrees north, the vertical deflection to POI at 1000 yds is ~1.7 inches high or low (shooting east versus west). At the north or south pole, vertical deflection from Coriolis force is null - zero - nada!