TheOperator
Plinker
I'm having a small problem with my mosin-nagant and have some pictures to help explain.
I noticed that after cycling a few rounds there would be a build up of copper wash on the lip of the firing chamber, as outlined in picture number 1
I thought it might be from a sharp edge or metal file scraping the cases, because it caused marking on the casing as outlined in picture number 2
So after some investigative work I found the rough edge to be on the bottom right of the chamber lip at around 8 o'clock and took a file to it (very carefully so to get grind away too much and cause head space issues) and now it just makes a rough scrape instead of strong sharp scrapes as shown in picture number 3
While this is an improvement its still not perfect.
Here is my question.
How strong is JB bore polish as an abrasive? Would it finish polishing off any rough areas so my casings don't keep getting scraped? I have a copper brush and power drill, but no dremel, so I'm hoping I can just get a nice abrasive and roto-rooter the problem away.
Also, the casing don't get scraped when being pushed into the chamber, only when I close the bolt and remove the cartridge do the markings show up. Maybe that will help in the diagnoses of what should be done.
Thanks to anybody who can give me help/advice!
I noticed that after cycling a few rounds there would be a build up of copper wash on the lip of the firing chamber, as outlined in picture number 1
I thought it might be from a sharp edge or metal file scraping the cases, because it caused marking on the casing as outlined in picture number 2
So after some investigative work I found the rough edge to be on the bottom right of the chamber lip at around 8 o'clock and took a file to it (very carefully so to get grind away too much and cause head space issues) and now it just makes a rough scrape instead of strong sharp scrapes as shown in picture number 3
While this is an improvement its still not perfect.
Here is my question.
How strong is JB bore polish as an abrasive? Would it finish polishing off any rough areas so my casings don't keep getting scraped? I have a copper brush and power drill, but no dremel, so I'm hoping I can just get a nice abrasive and roto-rooter the problem away.
Also, the casing don't get scraped when being pushed into the chamber, only when I close the bolt and remove the cartridge do the markings show up. Maybe that will help in the diagnoses of what should be done.
Thanks to anybody who can give me help/advice!