I'll basically echo what most people have said, and that is open bridge for most shots, closed bridge for extreme draw or shots requiring a hard hit. I must add that the rail bridge can have so many variations that it can make your head spin. Really no way to define this bridge as it can be different every time it is necessary to use depending on the cueball placement and type of shot required.
I will add that for shots w/cueball up-table, I will resort to the 'ol "Moosehead" bridge in a heartbeat
!!!
Maniac
I will add that for shots w/cueball up-table, I will resort to the 'ol "Moosehead" bridge in a heartbeat
Maniac