I use both the MTM and Berry's 100 and 50 rd. boxes as well as any original factory packaging that is still in good condition all loading details included inside.

Bulk blasting rifle ammo for my surplus rifles I bag and tag and keep in ammo cans. Reloadable brass is cleaned and prepped separated by headstamp stored in Ziplock bags and stored in plastic coffee cans.

I keep a few different types of ammo in Bandoliers on stripper clips some guy at the range was going to throw in the trash for quick access.