Do I have a Brass or Chamber problem?

[Catfish]

Jerry,
It`s hard when you can`t put your hands on the gun and brass but, it sounds like a presure problem. Your not seating your bullets into the lands are you??? I don`t think that the Custom shop would put out a .223 bore in a .223, but that would cause the problem. One other thing I can think of, is your barrel locking up tight? If you hinge pin is worn it might alow for some barrel movement. Are the cases showing any other signs of presure?????