A family member lives in Eastern PA and has to temporarily move his primers and powder out of the house. He's thinking of a storage unit that is sheltered, but unheated. He asked me if they would be OK, but I don't know for sure. No freezing temps where I live and heat is more of a problem for components. I've got some 20+ year old powder that still works fine. Also some primers over 30 years old. The Remington and Federal ones work fine and look pristine. Some Winchester ones discolored but seem to work ok. My storage temps vary from 30-80F. Any with experience of storing in freezing temps? What do you think?