Finished chambering a new barrel last night to 6.5-284 Norma. Using a 284 Win. go gauge, had the head space set perfect. I asked the customer to bring 3 dummy rounds with the cases he will be using. He resized new Lapua brass, and threw in 140 gr. Bergers. Checked the headspace with his shells and found that they had about .004 to much headspace. I had left the barrel in the lathe so it was nothing to adjust the headspace to his brass, but now I'm wondering if I did the right thing, or should I have just left it alone with the original headspace from the gauge?