Also known as the .30-30 Winchester. I have no idea what a hunting rifle cartridge has to do with Russia. Perhaps they were thinking of the 7.62x54R (used in various Russian military rifles) and mistyped?
You mistyped. The 7.62x54R is a Russian military cartridge used in a number of rifles, perhaps most famously the SVD.
It’s not a random string. 7.62x54r is a bullet calibre.
Edit; typo
Also known as the .30-30 Winchester. I have no idea what a hunting rifle cartridge has to do with Russia. Perhaps they were thinking of the 7.62x54R (used in various Russian military rifles) and mistyped?You mistyped. The 7.62x54R is a Russian military cartridge used in a number of rifles, perhaps most famously the SVD.