That stuff should be great. I have ammo that I bought in the 80's like that and it's like new. As long as it's not corroded and the boxes haven't fallen apart from water damage, it should be fine. I store my ammo that way and throw in a few of those beanbag-sized desiccant packs to hold down moisture accumulation.
Every once in a while, you see where "they" have found a warehouse full of military 9mm, or other stuff, from the 60's or 70's. It's for sale cheap and the same cautions apply. Just remember that it depends on how it was stored... extremes of weather can cause deterioration of the powder and some variation between rounds, AND it may be NATO-type stuff... really +P... for military... machine guns and the like. BUT, if it goes bang at the range... cheap range ammo, IF your pistol can handle it safely.
Wynn
USAF Retired '88, NRA Life Member. Wife USAF Retired '96
Avatar: Wynn re-enlists his wife Desiree, circa 1988 Loring AFB, ME. 42nd BMW, Heavy (SAC) B-52G's
Frédéric Bastiat’s essay, The Law: http://mises.org/books/thelaw.pdf
Thomas Jefferson said
“A government big enough to give you everything you want, is strong enough to take everything you have.”
and
"Peace is that brief glorious moment in history when everybody stands around reloading".