I have left my 1858 New Army loaded for over a year, and it still fires, every time. I load those little felt pills over the powder, pushed down tight, then a lead RB, pushed down tight on the powder. *10 caps on the nipples, also pushed down tight. I have left my .50 cal Hawken loaded for two years, and it fired, first time. I cut a 1/2" square out of a truck inner tube, punched a hole thru one corner, and tied it to the trigger guard with a piece of waxed linen cord. The square of rcbber gets placed between the hammer and nipple, to seal out moisture. Robin