Flames hit lower than aim point

[Fronto]

I've been playing with the ini file to tweak the shoulder view - hight and offset. Arrows seem to fly where the crosshair is (1st and 3rd person) but flames seem to be a little under the aim point.

The question is: will aim of everything allways follow the cross-hairs no matter what I do with the hight and shoulder camera offset in the ini file, or are there some rules to moving the camera and aiming?