The rifle was at least good enough to help win WWII. Get a late model though, one built for smokeless powder.
MNs were all manufactured to shoot smokeless powder. The 7.62x54R was never a BP cartridge.
The Finns are the best shooters, particularly the M39. Finnland was a part of imperial Russia, they split slightly before the October Revolution, I believe. They had thousans of Russian rifles in the imperial arsenals they took over, so I guess you could say they were captured. Most of the later rifles werer captured during the Winter War and the Continuation War.
The common "Sniper" from Enema at the Gates is the M91/30. There are plenty of replicas around. going for $350 to $500. Genuine snipers are considerably more.
The MN was adopted in 1891. It did considerably more than fight in WWII.