A little off topic, but thought I would share.
Grandfather worked on a Corps of Engineers dredge in Columbia River to Pacific. He passed in 1963.
Dad had a US military ammo can, the old guys on here remember the spam cans of ammo. It is a sealed metal can opened by a key type handle that twists the metal seal open.
Marked in yellow letters/number 1940 something, AP 3006 xx rounds.
Dad said Grandfather found several of these boxes in the dredge debris. Unknown what year. After Dad passed in 2010, I opened the only can left. Can was rusty,ammo was loaded into M-1 Grand clips was fine. I shot some and every round fired. Fearing the primers could be corrosive, I cleaned the rifle barrel right away. For those who do not know AP means armor perciering. I ended up pulling the bullets and loaded them into .308 cases to use for as bug out ammo for a AR-10.