Since the rounds you have fired or tried to load were probably sized in .219 Donaldson dies what you may have to do is send the fired brass and one that shows the problem areas (and the chamber cast) to CH4D and get his opinion on dies. Back in the day everyone was making their own chamber reamers for the .219 Donaldson. If you think your chamber is close except for a couple of tight area the other alternative, and maybe the best, is to rent a .219 Donaldson chamber reamer and touch up the chamber to what is now the accepted standard that commercial dies are set to reload to.
