Been away to visit family...
LOL No offense taken. I knew it is corrosive, the seller disclosed it. But I'm used to shooting Yugo M67 and Russian 7n6 ammo, so the idea of corrosive primers is OK with me.
Yes, it does state 1/78 on it, so I figure that is the date of manufacture. The 7n6 5.45 ammo I am shooting is from the late 80's also and they have been very reliable in my AKs. This .308 was a good deal in my book, about 49¢ per round shipped. I've never seen .308 brass ammo this cheap since, what, 2006?
The reason I am hesitant to open it up is that if there is a tin protective layer inside, it may provide a better seal than what my USGI cans can provide. If the tin inside is anywhere as good as the tin inside Yugo M67 crates, I might leave this ammo alone until I decide to shoot it. But if I see corrosion, gashes etc. I'll move them into USGI cans.
Thanks for all the replies.