Quote Originally Posted by Frederick303 View Post
This difference was related to the Corolis force if I recall correctly, which is in opposite directions in the northern and southern hemisphere.

Careful, careful! This can rapidly slide back down to pub anecdotal level again, just as our brain cells were getting nicely warmed up!

If IF IF there is anything at all in the Coriolis idea, which seems to have been around as long as people have watched water going down the plughole, then any effect would depend on the direction in which you are shooting. And I have heard quite a lot of B-S over the years, but never that someone's rifle had a POI that altered if he changed the direction in which he was shooting.

Maybe I have just led a sheltered existence, or maybe all ranges have the same orientation. But combat is certainly not neatly arranged to be in the same compass direction as range practice, so even if the effect did exist, any built-in compensation would be 5/8 of f.a. use in practice, to use a Britishicon engineering term.