Doncha ever hunt in the rain? Heck, I been out in conditions where the inside of my wallet was full of water. If I didn't go after whitetails in rain, sleet or falling snow I'd only have a couple days a year. Guns are built to be used outdoors. They ain't candy. Slip a greased cow's knee over the lock, find a hemlock to sit under and dream about a warm bath. Don't you think your poor, dear smokepole feels the same way? But when you get home leave the gun outdoors until you're ready to clean it, and be ready to clean it before you drop into the sack.
Water doesn't hurt the metal on a gun. Salts and acids in the fouling hurt the gun. The trick is to use enough water to flush all the salts and acids away, then chase the water off.
Here are two good descriptions of hot water cleaning:
http://www.owlhollowgunclub.org/stories/ml-maint.html
Cleaning a muzzleloader with hot soapy water
Water doesn't hurt the metal on a gun. Salts and acids in the fouling hurt the gun. The trick is to use enough water to flush all the salts and acids away, then chase the water off.
Here are two good descriptions of hot water cleaning:
http://www.owlhollowgunclub.org/stories/ml-maint.html
Cleaning a muzzleloader with hot soapy water