I've left my ML's loaded for long periods of time during, and after the hunting seasons. Never a hang fire or failure to fire. I do not leave my guns outside, or in the garage over nite...I bring them in, dry them off and oil the metal parts.
I always carry a cap-n-ball pistol when I hunt. I do not fire the gun through the whole season, normally. I still don't have a flap holster for it, so it's pretty exposed, maybe not quite as much as a rifle. It goes out all day, and comes in the house or camper, or tent at nite. Then I can leave said revolver in the closet for months after season, change caps, take it out and it fires normally.
I am VERY meticulous when I dry the breech, barrel, and flash channels, or touch hole. I use pipe cleaners, and little tiny rags on little tiny screwdrivers to get into all the far away places. Days before loading the rifle I will put a long strip of rag on a slotted tip, poke most of the rag into the barrel first, then run the rod down to the breech and let the rag/patch soak up any oil. Just let it sit in there for a day.
I truly believe that when a main charge becomes damp it is from cleaning or loading procedures. I believe people just don't take the time required to dry the breech, barrel and flash channels. Some people might think they don't need to if they just pop a cap or two.
I just can't buy into the theory that the main charge draws much moisture from the air, especially through a capped nipple. As OJ suggests put something between the hammer and nipple when it's uncapped, or plug the touch-hole on a flinter. If main charges draw so much moisture, sealed on both ends, why do powder horns remain bone dry, with just a loose fitting wood plug in the end??
Again, I think that if a main charge becomes damp, or oil fouled, that moisture came from somewhere else, and obviously it didn't draw oil in from the air. (I also believe that the main charge sometimes soaks up oil left in the breech/barrel, and that is mistaken for the powder drawing moisture from the air)
:yakyak:
Rat