Go to
www.cabelas.com and go to the hunting section. They sell bulk ammunition.
They have .223 (USA made) FMJ and soft points.
With each purchase they throw in a free metal ammo box.
Starting prices are $54.99 for 250 rds of FMJ and $59.99 for 250 of soft points. Both are 55 grain.
You can buy a case of 250, 500, 750, or 1000.
If you're wondering, Cabelas has been around for many years and won't take you for a ride...if you know what I mean.