Thank you Capt. Frank l will try that, so far l have tried shooters choice and sweats 7.62. I don’t have a borescope but if l hold it up to a light it looks like it has some pitting in the chamber and in the barrel, not sure if it had Ammo with corrosive primers shot in it and not cleaned or just neglected over it’s lifetime. The rest of the gun on the outside looks great, like a 120 year patina. I am going to try your method and see if it will clean up some more. Thank you all for welcoming me to your forum and for the ongoing knowledge you share, these rifles are a great part of our firearms history and l am enjoying learning more about them.