I've got over a case of 9mm, 9x18 Mak, .45 acp, .32 acp, 22lr, and 7.62x39. Well over, in some of those calibers.
In the following, I have what I deem to be "sufficient": .308/7.62 NATO, 30-30 WCF, 7.63 Argentine, 8mm Mauser, 7.62x54R. I did pick up a couple boxes of good factory brass in those, before prices skyrocketed, just to have some "good stuff" on hand.
Somehow, I have 10 rds of .25 acp, and about 150 rds of .40 S&W, without owning a gun in that caliber.