Checked 34 cases of Lapua 6.5 Creedmoor brass this morning using a Hornady Lock-N-Load Headspace gauge to check the Case Head to Shoulder Datum Line Measurement. New Lapua Brass consistently measures 1.555". These particular cases were reloaded 3 times and the shoulder bump that I used last time produced a measurement of 1.555". I measured the fired brass this morning and came up with the following: 1.5575" (5 cases), 1.558" (18 cases), 1.559" (8 cases), and 1.560" (3 cases). I would think the formed-fired cases would be closer in dimension. I have always annealed this brass, starting with the first loading. Is this variation, .0025" within normal expectations? I'm going to strip my bolt even though it is a bit of a PITA, and check my chamber dimensions with this fired brass and see what the actual headspace of the chamber measurement is.