I tried turning some necks last night and has some issues. This was once fied brass, resized with a Lee Collet die. but the case mouth didnt fit all that well - there was enough slop to cause it to cut at an angle. This is confusing since a bullter wont slide in. I am using a Forster cutter for a .308 caliber, and the guide is correct (checked). What is the specific process you are using (how do you do it so that there is no slop), and when in the life of the case are you doing it? What am I doing wrong here? Thanks for your help.