Thinking along the lines of the OP, I recently bought a gazillion rounds of once-fired military 9mm brass and some inexpensive dies. For the most part I only shoot rifle, so reloading pistol for me (especially on my single-stage press) is not something I plan on doing a lot of. But it is good to have the ability if, as suggested, the government decides to make things difficult. Actually, since I am in California, I can attest that our government ALREADY has made things difficult for ammo purchasers. The OP's advice is well taken.
Tim
You're going to hate yourself for buying military brass. Removing the crimp in those 9mm cases SUCKS.