I have always read that the best way to store gun powder, is to keep it in a cool, dry place.
Over the decades, I've accumulated several 8 Lb jugs and 20 to 30 pounds of powder in 1 pound cans. I understand storing them in a cool dry place would indeed probably be best. However, not all of us have that option due to limited space in our homes.
All of my reloading and casting supplies are kept in my shop out back. Keeping the climate controlled to an ideal temperature is not really feasible. I live in a humid part of Oklahoma where it often reaches 100 degrees for weeks on end during summer months. My shop stays dry, but keeping it cool all summer long would be costly to say the least.
I have powders I've had for decades in partially used cans, and when I occasionally check them they all seem fine and good to go. I keep it all in a wooden cabinet in the corner of my shop. I would like to hear the experience of others living in high humidity areas with the same issue.
Note: In all of my years of reloading and storing my powders in my shop, I have yet to have any of it go bad from being stored in less than ideal conditions.
Thoughts and experiences from the collective membership on powder storage under these conditions?
Thanks,
Murphy