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Specifications of BT-100 guns.

Discussion in 'Shooting Related Threads' started by maka, Sep 10, 2011.

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  1. maka

    maka Member

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    Are BT-!00 guns with drop out adjustable guns back bored from the factory?
     
  2. miketmx

    miketmx Well-Known Member

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    If it has Invector Plus chokes instead of Invector then it would be backbored.
     
  3. luvtrapguns

    luvtrapguns Well-Known Member

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    Mine is. Marc
     
  4. Strait Shooter

    Strait Shooter Member

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    If it is factory backbored , it should say backbored below where it says the barell length and choke indication. That is assuming it is a fixed choke gun.Like this.
    34 *
    backbored
     
  5. Borderland

    Borderland Member

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    I dont know about "backbored"....I think they just come standard with a .740 bore the same as other Invector plus Brownings

    Ken
     
  6. Hoosier Daddy

    Hoosier Daddy TS Member

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    All BT100's have a large bore, usually measuring from.740 to .745. The drop out triggers were able to be switched from eject to extract on most models of the gun. They were also able to adjust the trigger for pull weight on most models. They came in three different rib heights at the muzzle resulting in three different points of impact ranging from 60/40 to 70/30 and 80/20. The difference was dictated by the height of the rib at the muzzle end. The ribs were not adjustable. The satin models were cheaper and did not have all of the adjustments on the trigger. I think they were extract only. Some models came with thumb hole stocks and I for one could not shoot them due to the fact that I could not reach the trigger when my thumb was in the proper place in the hole. These are very good guns and are still selling in used condition for practically as much as they sold for new.
     
  7. miketmx

    miketmx Well-Known Member

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    I thought that "backbored" was a term made popular by the late Stan Baker and I didn't think Browning ever used that expression.
     
  8. Strait Shooter

    Strait Shooter Member

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    In answer to the question of whether Browning ever used the term Backbored.
    From my BT-100 oweners manual page 14. [Back-Bored Barrels] The BT-100 utilizes a back-bored barrel on all models. "Back-bore" is a term for a shotgun barrel that has a larger bore than the minumum specified for that guage by the Sporting Arms and Ammunition Manufactors' Institute {SAAMI}. Your BT-100's barrel is back-bored but falls within the maximum allowable diameter specification set by SAAMIfor 12 guage barrels.
     
  9. Hammer1

    Hammer1 Active Member

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    .

    Any other distinctions between a BT-99 and a BT-100 ?

    .
     
  10. grntitan

    grntitan Well-Known Member

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    Hammer,

    Click on this link above. It's a thread that covered the differences.
     
  11. JACK

    JACK Well-Known Member Supporting Vendor

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    Hoosier D. I question the rib variations that you state. Can you provide some evidence other than what someone says on TS.com? I recall guys talking about height of rib at muzzle. A little evidence will do it for me.

    J
     
  12. Calkidd

    Calkidd Well-Known Member

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    Jack, I read there were three heights of 3/8, 5/16 & 7/16.
     
  13. Habib

    Habib Member

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    My Bt99 and 100 both measure .736 bore. inv+
     
  14. BL350

    BL350 TS Member

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    Dear Hoosier Daddy,
    I accept all your descriptions of The BT-100's features except for the rib height variations at the muzzle. I read this stuff two months ago and have not been able to validate this or find a BT-100 SS or blue versions that had a different height. The large bores(.740 nominal) were typical of the first guns sold and any that I have measured over the years. They had a fairly short forcing cone also. But the varying rib heights have not been seen by this writer.....Respectfully submitted....Ex-Jet Boat Bill
     
  15. Habib

    Habib Member

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    My 100 rib is 5/16" at the muzzle.
     
  16. Bill Roberts

    Bill Roberts Active Member

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    BL350 you can believe the rib height or not. I had all three at one
    time and still own two them and sold the third to a guy in Texas.

    Respectfully;

    Bill Roberts
     
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