So, I was a good boy this year and got the Mosin I have been asking for for Christmas! It is a very nice 1937 Tula with a clean, uncounterbored bore. The problem is that the bolt seldom catches on the sear when the bolt closes. I have taken some shots of the bolt, could this be my problem? I was thinking of working it with a medium and fine grit stone to bring a good smooth edge back to it. Or should I use something else?