A little too big for .223 - Plano 50 Count Rifle Ammo Case with Hinged Cover

I like the construction of this box. It is solid for a plastic box. It has a hinged cover that folds back completely and and latches that lock well. The boxes stack nicely on top of each other because of the raised surface on top and recessed surface on the bottom.
(I know that it does not state it is rated for .223) But the holes for each 223 cartridge are a little too big. It works, but each cartridge is lazily leaning this way or that way.
I gave it four stars because I do not like that the bottom is not flat. The recessed channels that make the box stack easily, protrude into the flatness of the bottom. This makes the cartridges lean to the left and to the right.