Originally Posted by Jordan Smith
Ignore spin drift.

The guy shooting to the north has a bullet that is moving to the east faster than the target is, so his bullet hits to the right of POA.

The guy in the southern hemisphere does hit left of POA in every case. If you add in spin drift to the right, that will negate the effect of Coriolis at some distance, which pushes the bullet to the left regardless of which direction you're pointing (except for due east or west).

Read my previous post again. It explains Coriolis without taking spin drift into account.

Just saw that this thread was bumped.

I should clarify something that I said 2 years ago: Coriolis causes the bullet to strike to the right in the northern hemisphere and to the left in the southern hemisphere, regardless of which direction you're shooting. The only place where there is no lateral drift caused by the CE is if you are standing on the equator shooting due E or W, in which case there is only a vertical shift in POI (due to the Eotvos effect).