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Perazzi TM-1

Discussion in 'Shooting Related Threads' started by Danny56, Mar 9, 2009.

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  1. Danny56

    Danny56 TS Member

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    What are the factory bore and choke constrictions of an unaltered Ithaca Tm-1? Thanks Scotty
     
  2. WarEagle2017

    WarEagle2017 Active Member

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    Danny the barrel should have markings on it underside near the chamber something like 18.4 ,,, which would be your bore dimension you have to convert that to a decimal, your choke is what it is, to be sure of the constriction you have to get it measered, the one I had was a 40 but you dont know for sure what your is until you measure it, they are not all the same. Tony
     
  3. Quick 1

    Quick 1 Active Member

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    The ones that I've owned or measured had bores of .724 or .725 with around .040 constriction. Hope this helps. Mike
     
  4. alfermann66

    alfermann66 Member

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    Mine is .727 with .044 restriction.

    Buz
     
  5. Danny56

    Danny56 TS Member

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    Measured mine.it is .729 with .037 restriction
     
  6. JACK

    JACK Well-Known Member Supporting Vendor

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    Lucky you
     
  7. Danny56

    Danny56 TS Member

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    Anyone know what the figures would be on a Tom Seitz or a Wilkinson barrel?
     
  8. JACK

    JACK Well-Known Member Supporting Vendor

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    Ernie? is that you?
     
  9. Danny56

    Danny56 TS Member

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    LOL No it's not Ernie this TM-1 is mine and Unca Ernie can't have it. Just trying to figure out if my barrel is stock or if it has been worked on.
     
  10. JACK

    JACK Well-Known Member Supporting Vendor

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    Scott. I would asert that your bore mike is "off". Few if any barrelsmiths will alter a italian bore by such few numbers. Seitz used to like .740 and about .032 const. I have no recent experience with Wilkinson, but I'm guessing he is likely at soimilar numbers. Those bore and choke IDs are kinda common and have been fo ryears. I suggest that you get another opinion. And it is possible that yor TM1 came from thefactory like that, with those dimensions. It could be too, that you have plastic build-up in your choke region. Cleand the bbl, re-calibrate your mic and give us a report.
     
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