Free: Contests & Raffles.
I use these for BH209https://www.muzzle-loaders.com/accessories/cappers-loaders/blackhorn-209-muzzleloader-powder-tubes-6-20-pack.html
blackhorn209 is 100% waterproof. Put some in a jar of water and it will never melt down.Moisture problems = user error - Lack of prepping to prevent moisture from happening. In close to 20 years of muzzleloading, never once have I ever had moisture kill a charge. Including hunting in rain and snow storms. Poor prep by the shooter is what causes folks to have problems, not the product.