chetmarks
I certainly have to agree with you.... I really do prefer #11 caps they seal better and stay on better... just make sure you are using #11 Mag caps vs the standard #11. #11 Mags are just as hot as a Musket cap.
In the snow or rain I just put on a nipple rin coat or wrap the area in a piece of cling wrap...
Here is a picture with an example of a cap rain coat and a piece of cling wrap wrapped around the nipple and bolster area... just pull the trigger on both no need to remove a thing...