Just started developing loads for a 6.5-06. I am reaching fairly hot loads and have only one possible hint of excessive pressure. The brass is new Winchester 25-06 and when unfired, measures .464 at the base. After the first firing, they measure .468 at the base. There is NO cratering of the primer dimple, primer edges are totally rounded just as they went in, and the bolt handle lifts easily with 2 fingers. I assume that this expansion at the head may be just from the brass being new. What do you guys think?