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m12 problem

Discussion in 'Uncategorized Threads' started by kysmith, Apr 2, 2008.

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  1. kysmith

    kysmith TS Member

    Joined:
    Feb 24, 2008
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    Got a new to me M12, 1953 manufacture, built up trap model. Pretty smooth and doesn't seem worn out. When firing (Not dry firing) is hard to pump open after shot. Works fine when dry firing and racking action. Can't even hit the release button to get it to opem. Will open with much force.

    Tried it again. Bolt will release just a bit and binds. Seems like the left hand extractor may be catching, but I'm not sure. Took trigger group out with empty shell still stuck, couldn't see anything binding up.

    Ideas? Anyone have an online takedown guide?
     
  2. kysmith

    kysmith TS Member

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    Feb 24, 2008
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    yep, any load, tried cheap paper rios, feds, wins, all light target loads
     
  3. Rebsmith

    Rebsmith Member

    Joined:
    Jan 29, 1998
    Messages:
    159
    From your description of the action, it duplicates the problem Winchester had with the "improved" dog-leg action slide. In 1954 at serial about 1.5 million, they changed the slide to a 2 piece stamping that was the larger twin to the one on the model 42. After the complaints started piling up, Winchester recalled them and offered to replace all the ones in service. I have a Skeet gun with factory Cutts that has the dog-leg slide and the first shot I took locked up the action as you describe. Take a look at your action slide to see if it comes straight out of the forend OR makes a 90 degree up and 90 degree back to the receiver.

    Jere
     
  4. kysmith

    kysmith TS Member

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    Feb 24, 2008
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    It's a 1.3 million and has a straight rod.
     
  5. wrzone

    wrzone Member

    Joined:
    Apr 20, 2006
    Messages:
    117
    You need to check headspace ring to make sure it matches the chamber. Stick your finger inside the chamber to see if there is a ridge between the two it does not have very much maybe .004 or .005 if that.

    Also if someone has replaced the takeup ring most of the time this will cause a ridge between the headspace ring and chamber. Hope this helps
     
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