New powder, new bullet and primer every morning, under any weather conditions. I don't shoot it because I dont want to have to worry if there is any fouling in the barrel or breech plug. After I dump every thing at night I pull a dry patch thru it and visually check breech plug. I pull another dry patch in the morning and load it up. Some guns shoot better with a fouled barrel but when I sight mine in I like to know where my shot is with a clean barrel because that is what I hunt with.