I just got my first Star sizer and the die has holes for three grooves and holes for two grooves and I am casting 45 cal with a single groove. So I have to plug some holes. Do I use the bottom set of 3 holes, the bottom set of two holes or even the middle set of 3 holes or what? My assumption is that you want the bullet as deep into the die as possible to avoid getting lube on the nose, but I have nothing to support that assumption.