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The steel cases cannot be reloaded. You can sort the brass cases by headstamp and store them in a cardboard box of one sort or another.I'd shy away from storing them in a plastic bag.
my guess would be that the zip-locks don't breath and may promote moisture problems..... unless desiccant is used as the OP suggested.Lee
You can just toss them in a plastic zip lock. Trash any and all steel cases. I like to sort my brass by head stamp and number of times reloaded.
HHHMMMM all the new brass I have gotten in bulk have been shipped and I stored in plastic bags and we are talking in 1000's. Guess I have been wrong for almost 50 years and it won't work. DAMMMM got a bunch of bad brass stored. I don't store wet brass how ever.JMOLEN