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Winchester Model 12 barrel question

Discussion in 'Shooting Related Threads' started by THOR5, Sep 12, 2013.

  1. THOR5

    THOR5 Member

    Joined:
    Jul 19, 2013
    Messages:
    128
    I have read many threads about the Model 12 but I have never seen the muzzle (choke) diameter for an unmodified full choke/trap barrel. Does anyone have this specification? It would be useful in the search for a stock Model 12

    Bob E
     
  2. wm rike

    wm rike Member

    Joined:
    Jul 19, 2007
    Messages:
    593
    I think it was this site that addressed that issue maybe a week ago.

    It's a moving target. My four factory barrels have from .728-.730 bores, and from 32 to 35 points of choke, so the muzzle would be in the .693-.698 range. Some folks reported more constriction.
     
  3. johnpe

    johnpe Member

    Joined:
    Oct 11, 2006
    Messages:
    293
    The above response is pretty much correct. The Winchester factory drawing for their full choke shows that for a 0.730 barrel the choke constriction would be 0.031 to 0.036 inches. It shows the bore diameter as being 0.730 to 0.735" but all I've ever measured (about 20) run from 0.728 to 0.730 as stated.

    Johnpe
     
  4. THOR5

    THOR5 Member

    Joined:
    Jul 19, 2013
    Messages:
    128
    Thank you so much guys now I know which tolerances to look for at the upcoming gun show

    Bob E
     
  5. merlynstrapguns

    merlynstrapguns Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    1,380
    The Y-Models were a bit tighter -- .040"/.043". I had a factory IM that was .018". I checked 2 more and they were nearly identical?? Go figure......m
     
  6. JT 27

    JT 27 Member

    Joined:
    Dec 13, 2012
    Messages:
    616
    I had a late Super Pigeon that measured .044 constriction. It was measured by several knowledgeable people. Bill Jaqua said it was the tightest M12 he had ever checked. I had bought the gun new and the bbl. was never touched. It killed on both ends.