Steel cased (not reloadable) and corrosive.
Full boxes have a lot of WWII collector interest though.
You should be able to trade for at least the same amount of new brand-name ammo, maybe more.
Looks like you have a few boxes of Evansville Chrysler US GI WWII ammo. It's like the previous post stated, corrosive, steel cases. We shot a lot of this through my MAC10 a few years back. Worked fine. Then I cleaned the MAC as we do with corrosive stuff, no problems. Good luck.