Some of mine is loose-packed in .30 cans, some of it is still in it's original packaging in .30 cans and some of it is in magazines and in .30 cans. Other ammo I have is of the surplus military type and in "spam cans", and some of it is just sitting in the cardboard boxes from when I ordered it bulk. I usually toss a few desiccant packs into the cans for good measure.