I have left MLs loaed for several months and they worked fine and took Deer having them completely free of water and oil at loading and keeping the internalsd that way is essential but if this is doen they will work I even hunt in a light or mild rain and just wipe the gun/lock/barrel down and run a lightly oiled patch, down to the ball followed by a dry one, out of curiosity, what kind of Trade Rifle do you have, English pattern, Lancaster pattern, Lehman,or other?