This should be reported to the DOD Inspector General's office under "Waste Fraud & Abuse" of government resourses.
Spent brass (down here) goes to DRMO (Defense Reutilization and Marketing Office) where it is auctioned off to the general public's highest bidder.
This way it's a "Win/Win propostion; it's worth more in the taxpayers pockets as reloadable brass than "scrap metal".