Kinda off subject concerning lubes a bit but still deals with rust. I have a lot of different muzzleloaders. Long guns and handguns. I notice that some guns rust easier than others. If i shoot five different guns all using Blackpowder, clean them all thoroughly, lube them and come back a week later and run an oily patch down the barrel a few will have a little rust and a few never do. I think a lot of rust issues have to do with the different compositions of the steel used in different guns. I have a SMR I built years ago using a green mountain barrel. It has the most horrible looking browning job on the barrel that you’ve ever seen. It will NOT take to browning solution. I’ve tried to rebrown it numerous times. I finally just let it get its own patina. You can’t make that barrel rust. On the other hand I have a few Italian guns, a colerain barrel, a TC barrel, that when I put a couple coats of solution on, in 24 hours with a little humidity will take on a nice brown finish. A Parker Hale musketoon I have will rust in the safe if you store it with a quart of Mobile 1 in the barrel. Some you have to work really hard to neutralize the browning solution or it continues to rust. If a gun is clean, dry and lubed ive never seen much difference in what type of lube you use to prevent rust. Some barrels just require a bit more attention so I come back a few days later for a second application.