...buy a pallet of 28,000 rounds of ex-Indian military .303 Britishicon FMJ MK VII 174GR FMJ, Corrosive, Berdan Primed ammo*. That's a mere 65¢ per round. This is a hell of a deal since the $18,200 price is knocked down from the original $30,000.

303 British FMJ MK VII 174GR FMJ (Pallet of 28,000 Rounds) Corrosive, Berdan Primed | The Castle Arms

Yes, they'll sell you smaller quantities, too. Oh yeah, don't forget to add in delivery costs!

DON'T FORGET: at 10 rounds per mag, that's enough for 2,800 full mags. You know, in case you want to start your own little war with the neighbors!

* The info is real, but I'm posting this tongue in cheek...