I suggest a reloader measure before and again after and again after sizing.Quote:
I Used to form 6.5-06 cases from .25-06 or 270 brass. Worked great. Then I tried some militaty 30-06 and I think I had a thick neck-to the point where I blew up the gun. Welded the bolt shut, couldn’t open.
The 30/06, 270 and the 25/06 case body/including the shoulder are all the same.
If you necked the 30/06 down count on the neck getting longer. Problems are created when the shoulder becomes part of the neck. I find it an advantage when I need to off set the neck of a generious chamber.
F. Guffey