Just wondering if an in-the-white musket barrel will truly be safe with only wax on it and no periodic cleaning.
The answer is, from my observation, nope. All of my pinned guns with the exception of the Pedersoli trade gun, are armory bright (polished steel) or were bought in-the-white and allowed to develope a patina. Now, production guns such as my muskets, and some semi-custom guns such as my rifles, may not have quite the same, tight, wood to barrel fit that a custom rifle or fusil would have. So..., my stuff may be more prone to water getting in, and my observations may not be the norm.
The rusty areas, even though I grease up the barrel and the barrel well in the stock, are just below where the wood ends and the barrels are exposed. Yet, as I mentioned, I only unship the barrels from the stocks to be sure that the rust hasn't caused real problems..., and I only find surface rust that I remove with 4-0 steel wool. I have never found a catastrophe lurking..., so maybe I am doing too much?
Now my muskets are used for military battle reenactments, and get so hot (our rate of fire is a bit too high) that greasing up the underside of the barrel and the stock simply means that hot, liquid grease will be dripping from the gun. You can't wax them as it will simply cook off. (Maybe folks who only hunt and target shoot with them can wax them) The musket barrels get a bit more rusty, but nothing scary, and I clean the underside of the barrels once a year, unless we get in a drenching rain or I fall in a creek or something.
The worst problem that I have seen, and I have seen it way too many times, is the pins on the Pedersoli 2nd Model Bess (any size), and trade gun, rust through from water seeping in via the pin holes from the sides of the stock. I have found badly compromised pins, and some rusted through, when the barrel lugs are barely rusted, and the barrels not rusted at all. I have found this so often that when a fellow reenactor has me "overhaul" a Bess, I automaticly replace the Pedersoli stock pins with pins made from finishing nails, and enlarge the pin holes just a bit to accept them.
LD