Ugly Gun Sunday

Seriously, buy a Savage 110. It will probably cost less in the long run compared to buying a stock, butchering a bolt, tapping the receiver, and throwing some aftermarket flash hider on the barrel. You can get it in 7.62, allowing you to find ammo in any sporting goods store worth the name, reload with components ranging from cheap to premium, and hand tune them to the rifle (yes, you can buy lots of cheap 7.62x54R, but most of it isn't reloadable, a fair bit is corrosive, and you have to buy it by production lot if you find some that's really good in the rifle; good luck with getting the same lot if you're mail ordering small amounts). Most important, you won't be ruining a rifle that's possibly participated in major historical event or rare by turning it into a half-assed attempt at a tactical rifle that will eventually sell for a quarter of what the assembly cost was.