And don't forget to purchase a PAST recoil pad (magnum oh yes) for range time when you try to sight it in. You can wear it under your shirt so other Mosin owners won't laugh at you. I know this works.
Mosin owners tend to become slightly different, purchasing safe's full of these guns. Look for matching serial numbers, bores that have not been worked over, and muzzles that have not been cut off or used as tent stakes. There are some great Mosin owners club type web sites, I love their T-shirts.
Graf's tends to be the best place to pick up ammo, reload components, and Mosin pieces and parts. Or just buy another one and part it out. And the very best news of all? Boyds has aftermarket stocks that are better engineered and while they don't make claims, I hear recoil is reduced.
Some of the Mosin's are quite accurate.