Well...
Looks like I was not getting the straight story on the origins of this ammo.
I just had a chance to speak to the fellow who had this experience and it turns out he is not sure how old the ammo is. He is certain that it has always been stored in his ammo safe (with all his other ammo, none of which has given him any trouble) and away from any solvents or chemicals, but he cannot provide a date of purchase.
He did want an explanation as to why there is corrosion inside the cases, and of course all I can do is guess. He stated that he DID contact Remington and he received an automated acknowledgement, but has heard nothing back specific to his situation.
At this point, I have to say this really looks like something other than what it first appeared to be. Seeing as how the lot number could be a decade old, I'm thinking there are unique circumstances surrounding the event. For all I know, that box of ammo was forgotten and rode around under the seat of his pickup for six North Texas summers and he just doesn't remember that. Who knows...
As it stands now I wish I'd said nothing at all, but I guess it's better to err on the side of caution. I was led to believe this ammo was recently purchased, and had that actually been true I would think myself negligent for saying nothing.
Maybe Remington will have an explanation, or maybe reveal a date of manufacture...we'll see. If I get the info I will pass it on.
Sorry if I raised any unnecessary alarm.
