Has anyone had much luck with working up loads while fireforming brass? I have 100 pieces of Lapua brass I want to fireform and I also have 50 each of 2 different Berger bullets I want to work loads up for. Specifically I would like to shoot a ladder with each bullet and the un-fireformed brass. How close would the results likely be to using fireformed brass? I seem to have my best luck by paying more attention to the Chrono when running a ladder than the target so I could just try to match the velocity with loads after the brass is fireformed. Should I just forget it and get in 100rds of practice while I fireform the brass over the course of a few range sessions?