Plus One, Two, Three.........to all that has been said about storage, grease wads, cookies, etc. Prior to getting one of Dick the Dastardly's Mav Dutchman molds for loading 44 Colt, I used a Lee 200 grain flatnose cast bullet lubed with SPG. This spring I found three 50 round boxes of 44 Colt's loaded with the Lee's and 3FFF, marked 2008. They've been stored in my basement that is climate controlled, not to warm in the winter (no more than 60*), cool and dry in hotter months. Two of the three boxes shot without a hitch and the bullets hit where I was aiming. Third box still unshot. I do store all of my cast, lubed ammo bullet down just to prevent any lube from leaching down (if it would have an itch to do so). Do this with black and smokeless, handgun and rifle ammo. Even bottleneck rifle ammo I cast and load.