It's some good stuff
I pulled a box out of a friends shed that had been sitting for at least 3 years he said and when i say shed I mean it had two walls and a roof but mostly exposed to the elements, now it's not as bad here in nc winter wise as my native Minnesota but it still gets pretty cold sometimes and hot always, I ran a paper towel over each round (though I tossed one round because of corrosion) and loaded it into my marlin simi auto and it all fired like a champ.