i use ammo cans like you i have close to 10 cans with some having more than 1 caliber in it inside that i use ziploc bags if they are primed i throw thw cardboard label of the primer in so i will know what primers i used . pistol brass is not sorted ar brass the same except lc brass i keep it seperated for my 308 and 223 bolt guns i keep that brass seperated by brand and what stage of prep it has done to it .i reload alittle different i might tumble all week then deprime, trim resize for more than 1 caliber then prime another week .i always have brass that is ready for powder i just grab throw and go .