I got a chance to put some rounds down range with my Mosin this weekend. What a blast it was to shoot. Some shells were easy to eject, but some were also difficult. It took a good smack of the bolt handle to get it into the vertical position. From there, the shell extracted fine. Is the ammo causing that or is it something with the gun? All rounds fired fine and I inspected each spent casing but didn't see anything out of the ordinary. Is this the sticky bolt issue I've heard about? Thanks in advance.