the only gun I have bought in its original fitted case, and who knows how long it sat in there before I got it, was dirty, but basically fine. Brought it home cleaned it and put it upstairs. Got it out a couple months later and there was a little rust where the fabric and barrels touched. Cleaned it - lightly oiled and put it back. A while later, the rust was back. so I cleaned it down and refinished the twist barrels. after I was done, back in the case, more very light rust.
So I cleaned it, wiped it with oil and stored it next to but not in its case, no rust since. the non cased guns have had no issues
since it came in the case, and the issue started here - I have to assume it was triggered by the climate in the house.
so- it may just be as much a matter of the location as much as it is the case.
