I know the tape on the muzzle works and works well for a lot of people but I still prefer the muzzle mit...
One thing that I have found is if you get a nipple that the cap fits on very tightly - it will almost make a water proof seal... The only nipple I have found to date that this is the AMPCO bronze nipple... Problem if you do not shoot the cap you have to pry the cap off with a knife blade or some such tool
I have used this simple trick many time in the wet weather.... Just wrap the the area with plastic wrap... put the hammer on half cock.... when ready pull the hammer back and drop the trigger...
you can buy these rain kits that have muzzle mitts and cap sealers
