Originally Posted by
Fat Albert
Your headspace could be OK but you might have a fat chamber. If the body part of the chamber is too large in dia. (on the high end of SAMMI spec. or over) and your full length die is min. could be your problem. When you size the case, the body of the case is pushed in and the shoulder is pushed forward. Do unsized fired cases chamber in the gun? How much larger is the rear of the chamber than the web of a new factory case? How much dose the case oal length and body dia. change when a case is sized? If your sizer is too small for your chamber than you are over working the cases to get them to fit.