caliber to gauge conversion experts assist

bobski

12ga =
20ga =
24ga =
28ga =
36ga =
410ga =

ok with that determined, what ga. would a .38 cal or 9mm be?
what ga. would a .22 be?

put on your thinking caps!

mr_floppy

Unofficial guess. I have a .70 cal BP Cannon and a 12 guage shot gun wad just barely fits into the bore. (I use it for the compression). It's a snug fit.

Bobski, did you check out cdnn yet?

firstharmonic

12GA= .729
20GA= .615
24GA= .579
28GA= .550
36GA= .506
410GA= .410
These values are from a chart in the Dixie Gun Works catalog. And anything smaller than 50GA (.453) is usually expressed in the actual bore size, such as 410= .410. That's how your .22 or .38 or whatever would probably be "gauged". I think.

Noli Illegitimi Carborundum

Tailgunner1954

8ga = .835 or 83/84 cal
10ga = .775 or 77/78 cal
12ga = .729 or 73 cal
14ga = .693 or 69 cal
16ga = .662 or 66 cal
18ga = .637 or 64 cal
20ga = .615 or 61/62 cal
24ga = .580 or 58 cal
28ga = .550 or 55 cal
32ga = .526 or 53 cal

64 Maynard = 18ga
55 Maynard = 28ga
11.15x52mm = 55ga
44XL = 61ga
410 bore = 68ga
360 CF = 99ga
9.1x40mm = 101ga
9mm RF = 105ga
9mm CF = 105ga
32 RF = 142ga
310 Rem = ?
7mm RF = 223ga
6mm RF = 353ga
22 RF = ?
20cal Wingo = 582ga

The above are taken from COTW, to calculate it your self, Bore diameter X = a sphere with a volume of Y. Lead volume Y weighs Z pounds. 1/Z = gauge size. (Pure lead weighs .4105 pounds/cubic)inch

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Some guys like a mag full of lead, I still prefer one round to the head.

fugawe

An easy formula for this is 2.436 divided by the volume of a sphere of the diameter of your bore. A .224 sphere would be .0058in3. 2.436 divided by .0058 would make it roughly 420Ga.
The formula for a sphere is 4/3piR3.
If you care, that is...[:D]

If a man speaks in the forest and there is no woman to hear him, is he still wrong?