I have an issue I have never heard of or come across before. I cleaned both of my Mosin Nagants earlier (M91/30 and M38) and found the re-assembly of the bolts to be challenging, but the M38 was a breeze in comparison. The issue I've been having is every time I think I re-assembled the M91/30's bolt properly and I slide the bolt into the gun, it gets completely stuck and doesn't function like a bolt should. I have to take the receiver out of the gun so I can free up the bolt, because there is literally no other way I can get it out, even with force. Even though it's entirely possible I didn't assemble the bolt properly, I'm wondering why the bolt would go into the gun in the first place if it was assembled incorrectly. I compared the M91/30's assembled bolt to the M38's bolt, and there was no visible difference between the two, yet the M38's bolt is currently functioning smoother than any other Mosin bolt I have ever seen. I had M91/30's disassembled bolt soaking outside in mineral spirits most of the day, so I'm wondering if that could have made a difference?