.30 cal ammo can absolutely full of Argentine .308 (it's hard to close it's so full).
My guess is that it's about 300-400 rounds, and it's all shiny and corrosion free.
I found this a bit a go and it's not listed on my ammo documentation so someone gets it at a good price...
$45 plus shipping gets it to your door.
IM me here or email me. (tbaron55 AT yahoo.com)