i don't think i would shoot any of it.
i have a small amount of old ammo and they just don't make that stuff in those cool boxes anymore.
i think that 5 or 10 years down the road one might be kicking themselves for shooting what ultimately will become somewhat pricey.
remember people used to alter military rifles (krags) and pistols, (1911s) because they were everywhere.
one day the old ammo will be all gone, except for those that collected it.