I dunno, i guess the only one I could really lose is the 9mm. I'd like to stick to 1 semi auto caliber and 1 revolver caliber.
The 8mm lebel I dont actively buy ammo for nor do I actively shoot because its a hundred years old and kinda random, so I guess that doesnt really count since its not exactly stockpiled
I really only try to keep a good supply of 9, 45, 5.56, .308, and 12 gauge. minimum of 1000 rounds on hand for the handguns and rifles, something like 350 rounds of buckshot/slugs and a few hundred bird shot.
.22 is somewhat necessary to have.