The military, unlike SAAMI, has recommended hardness specs for different parts of the case. I think that overall control is helpful to the quality of the brass metal itself. Dimensionally it still doesn't keep up with Lapua, but then it doesn't cost nearly as much, either. And at the pressures we usually load for the Garand, if you anneal periodically and don't resize any further than you have to, that stuff should last through a lot of load cycles.