Except for 223/556 which are in food saver bags mostly, my reloads go entirely into "primo" factory boxes stuffed tight in 50 caliber ammo cans, what I mean by primo is different manufacturers look at the storage or
interstices differently. Sellier and Bellot and PMC are good (small) ones, Fiochhi is pretty good, Blazer, Federal and most others run in the huge category, factory boxes from Midway plumb stink. The guys at the shooting range laugh at me for dumpster diving!
I did a count/comparison once I think it was with 9mm packed into a 50 cal can (w/a descant always, I even wear nitriles to keep my skin oil off the nice clean brass to reduce the tarnish), bear in mind it's been a while, but the results went something like the "Bummer Boxes" two, to three of the "primo boxes", I think the numbers looked like 900 versus 1250.
Space is a commodity!
I just ain't got nothin better to do!