Here the sight,
http://www.gunsnammo.com/
Go buy a Finnish M-39, the Poor Man's Garand.
These are very accurate, and are a solid rifle with a little heft
to asorb the recoil of the 7.62x54R. The Finns took the Mosin Nagant
to the pinacle of prefection. (As far as you can take a Mosin.)
The reciever will handle the cartridge no matter if it was made in 1891
or later to end of production. The Finns even perfected them for competition shooting and Empire arms still has some I belive. If you want a cheap mosin then go buy an M44
or a 91/30 there everywhere, but if you want a rifle you can count on, then the Finn M-39
Is the one. I own several am quite pleased with them all. Then of course there is all the other Finnish models M27,28,28/30, yada yada yada.......... one caution there like lays potato chips you can't have just one.
My 2c.