Simo Häyhä (during WWII along the Kollaa River in Finland)
“The White Death” - World’s Greatest Sniper
He used the Mosin Nagant M28
But, also the Suomi K31 SMG submachine gun.
What ever works.
The Finns accurized their rifles. If you can find a finned 91/30 for a reasonable price , they are nice shooters (I don’t have one, just a M39 or two which are very accurate) regular 91/30s for $100 +/-
http://www.7.62x54r.net = all things mosin