[Unclenick]

One other item I'd forgotten that I ran into rereading part of Hatcher's Notebook is that military annealing is what he referred to as soft annealing, designed to make it as easy as possible for the brass to flow into generous machine gun chambers without cracking. The 1921 National Match ammo was made with less annealing, since match rifle chambers were tight, and it was deemed more useful to have brass that would spring back more in those chambers for easy extraction during rapid fire with the bolt gun.