Yes-
Y1003 Scarce .58 Rimfire Cartridge by Fitch, Van Vechten & Co.
Description: Excellent .58 cartridge for the .58 conversion muskets. This one has a clear headstamp and is an excellent example.
Headstamp: “F.V.V. &Co.”
Measures: OAL 1.693" CL 1.216"
Reference: Barber Pg. 28
A better photo.
7.62x54R AI LOL
Lol, no and no.
Is it a .30 cal of some sort?
Yes it is.
Looks Savage.
Surely it’s the cartridge for the Krag Jorgensen
Could be 
I was gunna 30-40 Krag?
And we have a winner. 30-40 it is.
Here ya go…
Is it an 8mm Mauser?
No mate but that’s a good guess
Is it something in 0.4 range?
375 ruger
No and No!
What about a 9.6x62mm Mauser?
