T-53 exreaction problem

[NOTABIKER]

I cleaned my newest T-53 just like all my other mosins and took it to the range. Broke the extractor trying to eject the first round i fired. took it home and bought a extractor. cleaned the chamber more. used a bore light and see nothing wrong. took it out today and fired about 8 rounds. extracting was VERY bad but i did not brake the extractor. got home and put polishing compound on a shotgun brass bore cleaner with a piece of rag over it and using my drill i polished the chamber.
It only sticks with a shot shell. so i put a used shell in the chamber and it stops before going all the way in. maybe 3/8 inch from going all the way in. impossible to force the shell in by hand. I tried old shells i shot in other mosins and they all stop in the same place. If i take these same shells and put them in another T-53 it snugly goes in all the way??. I even used a fine rat tailed file and carefully cleaned up the lip of the chamber at the face of the rim on the location the cartridge seats.
I measured the ID of a shell right at the rim and noticed a used shell expands about.003 thou over a new shell. but like i said weather it is a shell i shot in other mosins or this T-53 they all stick in the chamber and they all seat properly in my other T-53. any ideas.it is not a chamber needing more cleaning. Maybe it is a deformed lip of the chamber. after firing it does leave a scar on the spent shell about 1/4 inch long right before the rim which is the thickest part of the chamber. Maybe this will be the first MN that beats me.

[Enfield47]

John, can you post a pic of one of the shells fired from this gun?

[Tonymin]

I would guess the problem is at the barrel end of the chamber.

[NOTABIKER]

I am pretty sure i fixed it . I will pass on what worked for me. You know the old saying about trying the same thing expecting different results.
I forced a used shell into to chamber and with a magic marker i marked the shell at the 6 o'clock position. used a 1/8 aluminum rod to tap it out from the muzzle.
it left a nice gouge at 5 o'clock. put fine sand paper glued to a rod and worked it back and forth and checking my progress until i got positive results. I was finally able to insert a used shell with my finger all the way in and extract it with the bolt and extractor. then i went back and polished the chamber with automotive polishing compound. I can't be sure until i shoot it but i am pretty sure i fixed it. you could not see the bad spot even with a bright light. also you could not feel it with your finger.
made my day

[MosinVirus]

Hope you didn't open your chamber too much. You could have over expansion issues.

[NOTABIKER]

Hope you didn't open your chamber too much. You could have over expansion issues.

YES that is possible and thank you for your concern. I only used 1,000 sand papar on the lip of the chamber a 5 o'clock at the rim. I doubt i removed anything except the bur. the polishing compound is very fine like talcum powder.