The Dillon Ammunition Box - 223 is used to store cartridges (loaded ammunition) in the following range of calibres: 223 Rem and 5.56mm. This box has a 100 round capacity.
Dillon's ammo boxes are made of a tough, opaque plastic called "NoBreak". In testing, they dropped a full box off the second story onto the concrete floor; nothing was broken, the box didn't even come open!