Did Lake City ever make 7x57 ammo or brass?

[cash_tx]

I'm trying to figure out a mystery with a box of 7x57 Mauser reloads that I found in my late father's stash. These appear to be reloads from 1969 using Hornady 120 grain spire points, IMR 4064 powder, and a mixed lot of brass cases. Of the 18 cartridges in the box, nine of them have Lake City arsenal head stamps (the other nine are Remington UMC). I am unaware that Lake City ever made 7x57 ammo or brass, but does anyone else know? Is it possible that these were re-sized from something else? I can't remember what all calibers 7x57 shares a case head size with.

Note - due to the age and a few cases showing some slight corrosion (see pics), I do not plan on firing these (not gonna risk injury or my rifle). I will probably pull the bullets and load them into newer brass with new powder, and discard the old brass and powder.

 

[USMA84DAB]

I bet he trimmed and sized down .30-06 cases from Lake City.

 

[cash_tx]

I bet he trimmed and sized down .30-06 cases from Lake City.

That's my guess as well. I just couldn't remember if they were the same case head size.

 

[shootist~]

If he left them unfired for decades, there could be a good reason.
I've done the same and just procrastinated about pulling bullets.

No idea on LC making 7x57 brass, but I've never heard of any.

 

[Hunter-Habib]

No, they never did. These were definitely made from .30-06 Springfield casings.

 

[cash_tx]

Thanks to everyone for their inputs! Tonight I pulled the 18 Hornady 120 grain spire points from the cartridges, and discarded the old brass and powder. I also found a mostly full box of Hornady 120 grain spire points from another part of my dad's stash; so I think I'll work up a load with them in some newer once-fired Hornady brass over a dose of Varget (starting with a range of 41-46 grains, per the Hodgdon website).