What is the life expectancy of various powders? I've heard that ball powder will last indefinately after reloading. What about other powder types. I've heard some are no good after about two years. If I keep the ammo in my garage reloading area. It never gets below freezing, and not over about 80-85 in there in the summer. I have no room for vehicles in my garage as my reloading, woodworking, and other tools take up most of my garage. It is insulated, and I store NO gasoline in there. I use mostly RL-15, 4064, and Unique. Should I switch to ball for long term storage?