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What is nominal bore diameter of 20 gauge?

Discussion in 'Shotguns' started by Glamdring, Dec 11, 2003.

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  1. Glamdring

    Glamdring Member

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    I know 12 gauge is .729"

    And 16 gauge is .66" (more or less)

    Can't remember 20 gauge.
     
  2. PJR

    PJR Member

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    Shotgun Bore Diameter
    10-Gauge = Bore Diameter of .775 inches
    12-Gauge = Bore Diameter of .729 inches
    16-Gauge = Bore Diameter of .662 inches
    20-Gauge = Bore Diameter of .615 inches
    28-Gauge = Bore Diameter of .550 inches
    67-Gauge = Bore Diameter of .410 inches
     
  3. Glamdring

    Glamdring Member

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    Thanks.

    Been nagging me for several days. Read something recently that mentioned that 577 NE was basically a 3" 20 gauge brass shell.
     
  4. Highland Ranger

    Highland Ranger Member

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    Remington has a great soup to nuts shotgun course at: http://www.remington.com/safety/sbc_begin.html

    This gauge chart is from there:

    [​IMG]


    FYI - Gauge = number of lead balls of the diameter of the guns bore it takes to make a pound. So for 12 gauge, 12 .727" diameter lead balls make 1 pound.
     

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  5. Highland Ranger

    Highland Ranger Member

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    Shot size chart

    also from the Remington course:

    [​IMG]
     

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  6. Dave McCracken

    Dave McCracken Moderator In Memoriam

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    That's what I LOVE about this forum. Someone asks a question and get answers with charts and diagrams within 1.5 hours.

    Well done, folks!!....
     
  7. sm

    sm member

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    Tidbit:
    You will note from chart:
    For shot sizes #9 to #1, the number 17 minus the shot size equals the diameter in inches.
    [17-9=.08]
    Just in case you don't have a chart, or you need to bet a buddy as to whom is going to buy coffee. :)
    -Don't have a similar memory tool for other shot sizes and the like.
     
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