i have loads that are developed for a specific rifle, but i also test them in others of similar caliber for safety and basic accuracy testing. i seperate those specific loads into bags which are marked with the load info, and the if its a load i shoot a lot of - it gets its own ammo can.
if i have a specific hunting load for a firearm, i isolate them in 50rd mtm boxes with a label on top with the load info clearly marked.
for calibers that i have a hunting, shooting and plinking load for but dont shoot a lot of, they share the same can with the rounds separated by projectile type in marked bags (or other containers) inside the caliber specific ammo can. IE: my 450 bushmaster has two sets of ammo - hunting (250 ftx) and plinking (225 ftx). the plinking ammo is stored in the midway usa blue blem bullet boxes cuz they fit nicely. my hunting ammo lives in the MTM 50 round boxes. when i go out to go plinking, i just dump a blue box into a ziplock bag for ease of transport into my range can.
HTH