You may be able to pick up GGG brass at the NSC. I keep getting given the stuff that rapidly gets re-cycled into AR ammunition.

GGG brass is actually fairly good and often re-loaded, its not Lapua but with care its fine and quite tough stuff.

It is very easy to tell if it has been twice fired as its primers are ring crimped and the primers have a red laquer seal....so you will have to remove the crimp as well.