Try a bronze bore brush instead of steel wool, or stainless bore brush, it won't be as harsh on the bore, if it is hard packed preservative from the factory as suggested, that will help break it up, foaming bore cleaner does a good job on that goop as well. That stuff will give the patch a thick, goopy look, and tends to look like rust. On the barrel itself, some folks use carnuba based car wax to protect the metal from the elements, on high priced hunting rifles in high humidity climates. Never tried that myself, but heard it does work.