I did go buy some more ammo yesterday. My .45 ACP supply had dipped to 900 rounds so I bought 2 boxes of 50 230 grain FMJ. Have 1100 9mm, 300 3 inch 12 gauge 00 buck, 150 270 Winchester, 400 38 spec/357 mag, and several thousand 22 LR Firing off all of that would be time-consuming and inefficient.
You may want to investigate the availability of hand-held missiles or even a small tactical nuke.