Hello All, I bought my 1st Mosin Nagant about a week ago at the local gun show. My ammo arrived yesterday so I wanted to check to make sure the firearm functions properly. Unfortunatly I was unable to fire the rifle due to some rounds chambering and others not. In other words the bolt closes fine on some rounds and will not close for others. I ordered a 440 round tin of Russian Surplus ammo made in 1977. Headstamp 188. I assume this is an ammo issue and not the head space but wanted a second opinion before firing. My second problem. All rounds chamber except the last one. When I get to the fifth round in the magazine the bullet nose dives when I push the bolt forward. Anyone know why? I do not have the rifle with me but it is a Russian production and if mind serves me correctly it was manufactured in 1944. I think, not sure, the rifle is the 91/30. Its the long one if that helps. Please help. I want to shoot this weekend instead of waiting for an exchange. Thanks so much!