All the brass I have for my 338-06 is Winchester and it started out as 30-06. I use a Lyman sizing die. When expanding the 30-06 brass I lube the brass (inside and out), I raise the brass three or four times into the die, going a little further each time. That way it's not so hard on the neck. It has been my experience that the finished brass will come out about .010 short of the minimum length of 2.484 but I'm ok with that. I have found a couple of tricks to brass runout on the second loading but I'm too lazy to type it right now.