.22lr brass deformation

Discussion in 'Rimfire and Airguns' started by rancilio, Jun 12, 2012.

  1. rancilio

    rancilio Well-Known Member

    Messages:
    119
    Joined:
    Jan 23, 2010
    Can you diagnose my brass deformation problem? As you can see in the photo, all three cases are deformed. The bulge is about 1/2 around the brass. Each one is approximately the same.

    .22lr Blazers shot from a TC Encore with .22lr Pro Hunter 15" barrel. Thanks.
     

    Attached Files:

  2. winmag

    winmag Well-Known Member

    Messages:
    2,528
    Joined:
    Dec 23, 2009
    Looks like a terribly out of spec chamber.
     

  3. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,280
    Joined:
    May 13, 2012
    +1

    If it's closing properly, then that's your critter right there. Crappy chamber.
     
  4. BlackKnight755

    BlackKnight755 Well-Known Member

    Messages:
    217
    Joined:
    Jun 30, 2010
    Is it a new barrel or is it used? It looks as though someone that didnt know what they were doing had a dremel tool in the chamber... I wouldnt shoot it anymore without getting it fixed.
     
  5. rancilio

    rancilio Well-Known Member

    Messages:
    119
    Joined:
    Jan 23, 2010
    It was a brand new barrel. Now it has approx 30 rounds through it. The action closes properly and nothing looks out of the ordinary. I tried different ammo and that produced the same deformation.

    What should I be looking for in the chamber to say "that's the problem"? What's the fix? Thanks.
     
  6. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,280
    Joined:
    May 13, 2012
    Does TC know about it yet?? If they don't, get either them or your local shop in the picture. Rimfire rounds are rather fragile, so even though they aren't reloaded, this could be a problem.
    Look for a wide spot on one side at the back of the chamber- it looks like the reamer might have had an issue or something.
     
  7. rancilio

    rancilio Well-Known Member

    Messages:
    119
    Joined:
    Jan 23, 2010
    No, ya'll are the first to know.

    It shoots close-range. It is my yard gun. At 20y it makes one big hole. I have not shot it beyond that.
     
  8. mbor

    mbor New Member

    Messages:
    1
    Joined:
    Oct 27, 2012
    I'm having the same issue with my 15" Encore barrel. My cases expand into the extractor and are difficult to remove. Did you ever resolve this?
     
  9. Lefty7mmstw

    Lefty7mmstw Well-Known Member

    Messages:
    4,280
    Joined:
    May 13, 2012
    I'm seeing this on my kid's hot shot carbine too with some rounds. I'd try another brand and contact tc if that doesn't help.
     
  10. rancilio

    rancilio Well-Known Member

    Messages:
    119
    Joined:
    Jan 23, 2010
    No, I have resolved my .22 deformation issue. I need to get on it now though. I moved across the country to southern AZ and am just now getting my gear sorted out. I kinda forgot about this problem since I have not pulled a trigger in months.

    Let me know what ya'll figure out and I will do the same. I just bought some cerrosafe to check the chamber of another barrel, but it looks like my .22 will get first dibs. More to follow.
     
  11. RoadKill

    RoadKill Active Member

    Messages:
    39
    Joined:
    Dec 17, 2010
    Too much headspace with that barrel/frame combination but it’s not necessarily due to a faulty chamber. Check the gap between the breach block and barrel by snapping the barrel shut on a feeler gauge until the effort to pull the blade out increases. You might have to remove the extractor if you can’t work around it. The breach block can be shimmed out if it’s excessive. It could be different with a different barrel so check the gap for each if you use more than that one. See bellmtcs.com for the really good stuff on T/C’s.