you are all correct, I misread his post and apologize. Your not leaving it primed, yousimply want to know how to store it over night. I take both the primer out, and the muzzle mit off. I put the rifle in the same temperatures as I hunted if possible in a dry corner out of the way. I put a soft cloth on the ground and putting muzzle end down on the cloth lean it into a corner. That way any condensation that might form moves away from the main charge. As for the primer hole, I do nothing. So far I've been lucky. I wonder what would happen if a person put a Q-Tip in there? If that Q-tip would absorb any moisture that might form. Many of the breechs have a large hollow filled with powder so that would protect the actual flash hole. Something for me to experiment with I guess.

Like also mentioned, if it is real damp then your better off shooting and reloading clean the next day. In fact I have gotten so paranoid about them going off, I very very seldom leave one loaded unless I come in real late at night from somewhere.