A pile of fired 30-06 cases is a tremendous asset to a handloader of wildcat/obsolete/metric cartridges, as well as current ones. Save them all, if you can't use them maybe your grand or great grandkids can use them. In fact, it is an asset to have a quantity of different head sizes, lengths, and rim type cases on hand. Thet don't eat anything and a little tarnish or dust doesn't hurt anything.
Mike