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Are Browning BT-99's backbored?

Discussion in 'Shooting Related Threads' started by bodybuilder, Jun 26, 2010.

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  1. bodybuilder

    bodybuilder TS Member

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    Are Browning BT-99

    Does anyone know if about an 80's model with choke tubes (invector) are backbored?
     
  2. Sky Buster

    Sky Buster Sky Buster TS Supporters

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    No. Bore's generally run about .725 in the BT.
     
  3. short shucker

    short shucker TS Member

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    If they have the Invector + tubes, then yes.

    ss
     
  4. letts

    letts TS Member

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    I have a 2009 catalog Browning says they are back bored. I do not know when thay started back boring.


    Letts
     
  5. BILL GRILL

    BILL GRILL Well-Known Member

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    The way they shoot who cares. Probably more great scores shot with them than any other gun out there. Bill
     
  6. Rastoff

    Rastoff Active Member

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    If it is indeed an Invector and not an Invector Plus, then it is not back bored.
     
  7. halfmile

    halfmile Well-Known Member

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    .742" is the bore size of the Plus models.

    My BT-99's (6 over the years) all were .729".

    HM
     
  8. bodybuilder

    bodybuilder TS Member

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    So you guys agree with plain invector choles that the bore is normal size?
     
  9. JerryP

    JerryP Active Member

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    My 2004 model measures .735. I was expecting .740-.742. Would like to know what other new model inv. plus barrels measure.
     
  10. Sky Buster

    Sky Buster Sky Buster TS Supporters

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    If it's Invector choked, it's probably .725 - .730 That is not over-bored.
     
  11. Dave P

    Dave P TS Supporters TS Supporters

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    If it's a matter of what choke tubes to use you better have it mic'ed and know for sure by a gunsmith of known repute.
     
  12. Rastoff

    Rastoff Active Member

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    Browning's website is full of errors. Case in point, consider this pic:

    [​IMG]

    This image is from Browning's website. The caption under the pic reads, "Inside diameter of a back-bored barrel is .742 +/- .0015" If that's true then a back bored barrel would be anywhere from .7405" to .7435" in diameter. So why does the pic show a diameter of .745"?

    When talking about chokes, just use what's stamped on the barrel and you'll be fine.
     
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