All my ammo is literally inside the home....not out in the garage or shed or basement either...its in the living area of the home, entirely away from anything that might put out any humidity...away from windows or sinks...etc.
I hadnt messed with shotgun shells in a few years here....maybe 6 years or so.
And this shell was in an ammo can that had a dessicant pack AND the rubber seal, so its not like there was much moisture to get in anyway.....AND not one other single shell had even been discolored that was in the box with this one.
So Im very confused how one single shell ended up like this when I have many thousands of rounds of all kinds of ammo stored in the same exact place, in the same exact conditions.
Any ideas about what might cause this to happen to a single shell but none of my other ammo in the same place in the home?