I had a powder magazine out in the corn bean sunflower field when I had my shop on the farm. And I had 4 refrigerators in the barn that I kept powder in. You could put 50 lbs in each but the plugs/wires had to be cut off. I happen to have about a pound of HiVel #2 left from a 3 lb keg dated 1937. It's the powder I use in 30-30. Works good. It was DCd about 1964