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Old October 22, 2001, 03:01 PM   #1
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Join Date: September 19, 2001
Location: OKLAHOMA
Posts: 195
Caliber vs. guage

Does anyone know "rule of thumb" or a chart that has a conversion from guage,,,20,12,16,28, to a bullet diameter???
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Old October 22, 2001, 03:50 PM   #2
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Join Date: August 25, 2001
Location: KS
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yep :)

this is out of the KS hunters education book-should be true

12 gauge-.729
16 gauge-.670
20 gauge-.615
28 gauge-.550
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Old October 22, 2001, 04:02 PM   #3
Steven Mace
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Location: Clifton, Colorado USA
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Actually, .410 bore is the equivalent of 68 gauge. Hope this helps!

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After today, its all historical
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Old October 22, 2001, 07:36 PM   #4
Keith J
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Join Date: December 15, 2000
Posts: 469

Here's the whole picture. Gauge in scatterguns is a measure of how many bore-sized lead balls make a pound in a manner not unlike old cannon (5-pounder shot a 5 pound ball). A 16 gauge has a bore-filling ball of one ounce or 1/16 of a pound.

Lead has a density of 2867 grains per cubic inch or .4094 lb per cubic inch.

So, the formula for a sphere is 4/3 *pi*radius^3. To get cubic inches of volume from a 1/16 pound ball, divide1/16 (pound) by .4094 (pounds per cubic inch). Its about .1528 cubic inches. Multiply by 3/4 (inverse of 4/3) and divide by pi. Take the cube root to get the radius of .3316" Multiply by 2 and voila, .6633, close enough for Kansas hunter education material.
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Old October 22, 2001, 08:35 PM   #5
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Join Date: August 25, 2001
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hehe-stupid math!

and they said we would need math in life :-p lol-well i got i out of a book and thats how i do my math-
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Old October 22, 2001, 10:07 PM   #6
Big Bunny
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Join Date: August 9, 1999
Location: New South Wales - Australia
Posts: 605

I thought .410 was 36 gauge !?

68 Gauge sounds like a .22 !
Bad boys, bad boys...watcha goin' to do - watcha goin' to do when they come for YOU ?!
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