Caliber vs. guage

VTR996 · October 22, 2001, 03:01 PM

Does anyone know "rule of thumb" or a chart that has a conversion from guage,,,20,12,16,28, to a bullet diameter???

JosephBoeckner · October 22, 2001, 03:50 PM

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

12 gauge-.729
16 gauge-.670
20 gauge-.615
28 gauge-.550
.410-.410-duh

Steven Mace · October 22, 2001, 04:02 PM

Actually, .410 bore is the equivalent of 68 gauge. Hope this helps!

Steve Mace

Keith J · October 22, 2001, 07:36 PM

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.

JosephBoeckner · October 22, 2001, 08:35 PM

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-

Big Bunny · October 22, 2001, 10:07 PM

I thought .410 was 36 gauge !?

68 Gauge sounds like a .22 !

October 22, 2001, 03:01 PM	#1
VTR996 Senior Member 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???

October 22, 2001, 03:50 PM	#2
JosephBoeckner Junior member Join Date: August 25, 2001 Location: KS Posts: 159	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 .410-.410-duh

October 22, 2001, 04:02 PM	#3
Steven Mace Senior Member Join Date: November 15, 1999 Location: Clifton, Colorado USA Posts: 724	Actually, .410 bore is the equivalent of 68 gauge. Hope this helps! Steve Mace __________________ After today, its all historical

October 22, 2001, 07:36 PM	#4
Keith J Senior Member Join Date: December 15, 2000 Posts: 469	Math... 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 piradius^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.

October 22, 2001, 08:35 PM	#5
JosephBoeckner Junior member Join Date: August 25, 2001 Location: KS Posts: 159	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-

October 22, 2001, 10:07 PM	#6
Big Bunny Senior Member Join Date: August 9, 1999 Location: New South Wales - Australia Posts: 605	Gauges 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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