I recently picked up a M91/30 at dunhams on sale. While playing around with it at home I've noticed my bolt stays closed very weakly. Holding the rifle crossways in front of me and snapping hard with my wrists can cause the bolt to fly open. If I dry fire it first the bolt will stay closed quite securely. I did find one mention on the web that compared to other rifles of the time (like my mauser, CZ BRNO 98/22) the bolt does work very loosely. Is it really supposed to be that loose or is that the way it works? All I know is my mauser locks down securely and works great. I'd hate to fire the mosin and have the bolt blow back, shear off, and lodge it self in my brain through my eye socket. That would really ruin my day.