There is a trick with the stripper feeding of Mosins.
Take the top round and grasp it like a handle, bullet high. Push it down at the rear end of the round until it stops, release the top round, extract the stripper, close the bolt.
There us a lever device (interrupter) that sits in the trigger group that realigns rims during feeding. If you find that operating the bolt and driving in a new round gets a lot of resistance, this indicates that the wooden stock has shrunk until the necessary clearance for the lever thingy to work has decreased to where it doesn't work at all. Add card stock/cardboard shims between the trigger group and stock, and the gap will be restored.
At this point (A the stripper loading should get a lot easier, and B) feeding should get a lot smoother. Adjust shim thickness until optimum operation results.
Or..
Get on with Smith Sights, and use one of their Mosin Upgrade Kits, which do essentially the same things, only better.
http://smith-sights.com/Greg Langelius