There's no such thing as too many. I don't ever get rid of either one.
That said, I only carry and shoot my 9mm pistols so I only stock that ammo in bulk and I do own some rifles and shotguns that I don't shoot regularly and don't stock bulk ammo for.
I do keep plenty of 12ga, .270, and 9mm on hand for my "every day" weapons.
My two cents...
