The feds already tried that a few years ago. Several alphabet agencies including the FDA and the IRS put out contracts to the ammunition manufacturers which the manufacturers had to make a first priority. The contracts were for millions of rounds of every caliber of cartridge available to the public. As a result, and as intended by the feds, for s few years the supply of ammunition to the public dried up. It took the manufacturers so much time and bench space to fulfill these huge contracts worth millions of dollars they were unable to send any product to retail outlets. This was Obama in action.
I took care of that problem in 1994...I left California!