I keep all my powder,primers,ammo in a gutted out refrigerator in an out building.No heat.Heat and humidity is the culprit,not cold.I have a small closet type space in the basement that my gun safe and reloading table is in. I reload,I get the components I need out of the refrigerator then reload there.

I can't figure out why people don't use their garage as garage for their vehicle.They want to protect maybe $5000 worth of junk at the most and leave a$35,000 vehicle out in the weather. Twice in past in my young and stupid years when O rented homes, I did the reloading thing in a cold garage .The heck with that.

Build a 12x15 out building with a small space heater that looks like a Tuff Shed and use that.

If God wanted you to walk and carry things on your back, He would not have invented stirrups and pack saddles