Oh my.
Well, around here we tend to keep four or five thousand 22 rimfire rounds. My husband's vintage Ruger rifle tends to go through that caliber. And at least a thousand or two rounds of 5.56 again to keep hubby happy. Since I prefer bolt actions, there is always at least a hundred rounds of .303 Brit available when I want to embarrass hubby. Likewise there is usually a thousand rounds of .308 and/or 30-06, the latter kept for the Garand bought on a whim as it reminded me of my Grandfather. Finally a mixed bag of sidearm rounds namely 38 Super (when we can find them), 9mm, 32-20 (rifle and handgun but a handgun cartridge nonetheless), 44-40 (again rifle and handgun), 45 rimmed and ACP. Then, of course, various shotgun shells as well as powder and ball for
Do we have too many calibers? We have what we enjoy and what we have.