I used blued rifles for years in the Adirondacks which includes a week in a spike camp every year. plenty of wet nasty days ( even weeks) Over the years my anti rust protocol changed, from oil, to barricade to wax, its not really that hard to keep one from rusting in cold wet weather, but a short lapse and you can have rust. .
The bore is more of a worry as you can't see it easily.
These days I choose cerakoted stainless
