How about 7.7x58? Close enough? I have a couple 6.5x50s I'd part withIm kind of looking at something in 7.62x54r.
Seems like a neat round to play with.
Arshins, Russian word for pace.@Fightingfish
If you do get a Mosin , unless its been tinkered with , they are battle sighted in at the 300 Russian mark on the rear sight with the bayonet mounted.
( can't remember what they call the measurement unit they use )
there was a store on ebay i think that sold a replacement front sight and was adjustable for elevation