rocky mountin bill,
Sometimes if you get the chance, try 7x65R cases for your 30-06 rimmed. 9.3x74R works, but 7x65R is a little easier and my actual measurements indicate the head diameter of 7x65R is usually a couple thousanths closer to 30-06 head diameter.BTW,this works for 35 Whelen Rimmed also.
Mike