A little trick for your caplock rifle.

When walking or sitting, and you want to keep the cap nice and dry, take a tire valve stem cover ( auto garages and tire shops have hundred of them laying around and usually are more then glad to save then for you), cock the rifle, place the valve stem cover over the capped nipple and lower the hammer slowlydown onto the cap. The tension in the hammer spring will hold the cover, there in place. Actually on half cock my rifle still holds the stem cover perfect over the cap, but is not putting pressure on it. Then when your ready to shoot, cock the rifle, flick the cap off (some people string a piece of fishing line to the valve stem cap so when they click it off they do not loose it), or tip the rifle slightly to let the cap fall off, and your ready to fire on a nice dry cap. This valve stem cover will keep moisture out of the area, and it acts as a secondary safety, should the rifle's hammer somehow be accidentally tripped or struck while you carry it.