I would never store firearms and reloading stuff in a storage unit. Absolutely everyone I know that has recently used a storage facility has been broken into. The approach as I understand it is that the thief rents a unit for the month or gets the code somehow, maybe via an inside man, steals a car, then loads it up at the storage facility with other people's stuff. No locks are 100% effective against organized thieves. At least with a moving company, access to your stuff is somewhat limited. Anybody who knows the code can get into a storage facility.