8x57mm Mauser for China makers?

A question has come up about who made 8x57 ammo for China in WWII?. Some boxes are marked WCC and others are not but the buyers were told that the outside shipping crate was marked Lake City.
I bought a large amount of this ammo in the 1980’s and none of my boxes were marked WCC. Although the label is marked exactly the same as the WCC marked boxes. The ammo was Boxer primed and the propellant looks to be IMR 4350 or IMR 4895 type powder(?)
Who was making the ammo for China?

Thank you for your replies.

A previous discussion

Thanks for the link, I was reposing as the question of “other” US makers came up.