I was told they make a handi wrap that seals to itself. You can actually make a baggie out of it just by pressing it together. You just press the two sides together and it is sealed. That to me sounds like just the ticket to sealing a muzzle and a breech. Next time at the store I am going to look for some of it and do some testing.

In the mean time, I have finger cots for the muzzle.On a traditional rifle, I put a tire valve stem cover over the #11 nipple and close the hammer down on that. On my Flintlocks, I have a piece of leather that I sprayed with "Camp Dry" that I lay over the lock as I sit. It repells water real nice and stays so I can lay it over the lock. On my inlines, I normally do very little. My Knights seal up tight on their own. I have put handi wrap over my Black Diamond XR. The CVA Staghorn, the few times I hunted with it, there was really no snow or rain. Some handi wrap I am sure would have kept the breech just fine on that as well.