I used my hornady case headspace gauges to measure the unforced new lapua, once fired lapua from my target rifle, and the once fired prvi brass from the military rifles. I have my FL sizing die set to resize my once fired lapua 0.002 less and 0.002 which is 0.002 more than the new lapua brass. I can not get the once fired prvi brass to size to that. The smallest I can size it is 0.003 more than the once fired lapua brass.