8up...put a pencil between your fingers, as if an arrow when getting ready to draw. now start to clench your fist, just a bit..like you are starting to pull.. see what happens to that "arrow". Now, relax it a bit, as if the string is pulling your fingers and they are extending, rather than closing into a fist. The opposite happens. The first is what you are doing now. The second is what you should start doing. I believe that ...shallow hook, deep hook...doesn't matter as much as what I just described. Watched a whole bunch of new shooters go thru this and every single time, this is what occurred to cause that.
ChuckC