It can. I'll verify my load again from virgin brass to once fired brass. I normally don't see much difference. I did see some differences in my 6.5x47 Lapua from virgin brass to once fired. I sized it with a slight bump of .003", and picked up about 50 fps and had some sticky bolt lift. So, I may need to reduce my load a touch. It also didn't put them in the same hole like they did with the virgin brass.