Built my first savage recently in 6.5x55. I tightened the barrel down until it hit the go gauge. Put a piece of tape on the back of the go gauge to add 0.002" to make my no go gauge. I went and shot the other day for the first time. Tonight, I check my fired lapua brass against some new lapua brass using my hornady case/headspace gauges. They are the same. Should I expect some stretching? If so, is my chamber too tight to allow the brass to stretch? If it doesn't stretch and it is supposed to, will this cause exceedingly high pressures? There were no signs of high pressure on the cases.