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Old 05-06-2010, 05:10 AM   #1
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Default Grains?

Ok fellas, I may be about to show my azz here but I've got a question that's been bugging me for awhile and I've just felt to foolish to ask.

What's a grain? And please, don't tell me it's a unit of measure used to describe bullet weight...I've got that part, but what the hell does it relate to?

Is it some odball term that's been burned into our launguage which has no basis in reality? Is it an actual unit of measure that's only used for ammuntion because I've never heard of any other item being rated by grains?

What's a grain? How much does a grain weigh?

If this is trully a stupid question, please, just have a chuckle at my expense and answer it for me.

Thanks,

TACK

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Old 05-06-2010, 06:38 AM   #2
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This might help! Number of loads per pound of powder

7,000 grains to the pound. Old time unit related to measurement of cereal grain, (seeds).

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Old 05-06-2010, 10:47 AM   #3
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A grain is a unit of measurement of mass that is based upon the mass of a single seed of a typical cereal. Historically, in Europe, the average masses of wheat and barley grain were used to define units of mass, with the troy grain based on barley. Since 1958, the grain or troy grain (Symbol: gr) measure has been redefined on the basis of the unit of mass of the International System of Units as precisely 64.79891 milligrams.[1][2] Thus, there are precisely 7,000 grains per avoirdupois pound in the Imperial and U.S. customary units. In fact, the grain is the only unit of mass measure common to the traditional three English mass and weight systems (avoirdupois, Apothecaries', troy). Moreover, the measure for pearls and diamonds—the pearl grain and the metric grain—are equal to 1⁄4 of a (metric) carat, i.e. 50 mg (0.77 gr).
The obsolete Tower grain was lighter than the troy grain.

http://en.wikipedia.org/wiki/Grain_(mass)

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Old 05-06-2010, 10:56 AM   #4
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As I understand it the unit of measure was around in the time of the apothecary. I am not positive it started there but they used it and still do in the medical field. I had really not gave it all that much thought until my wife went to taking a pharmacy tech class for work and it showed up there in the apothecary math section along with some other really odd terms like drams and scruples. Grains there cross refer to milligrams with a funky formula. She tells me that a Dr up there still orders 30 grains of Tylenol which comes to 650 mg.

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Old 05-06-2010, 03:30 PM   #5
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Cool. Hey Tack, I didn't know either.

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Old 05-06-2010, 03:58 PM   #6
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And three barleycorns laid next to each other equals an inch in length.

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Old 05-06-2010, 04:26 PM   #7
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Quote:
Originally Posted by Jo da Plumbr View Post
And three barleycorns laid next to each other equals an inch in length.
And a foot is---well--the length of a foot!

Kind of weird about the barleycorns. You sure it's three? Seems like we
would be doing thirds/sixths/twelfths/twentyfourths instead of half/quarter/
eighth etc.
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Old 05-06-2010, 05:31 PM   #8
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And a yard is the distance between King George’s nose and the end of his arm. (so the legend goes)

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Old 05-08-2010, 10:58 PM   #9
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Good info fellas, thanks...

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Old 05-08-2010, 11:56 PM   #10
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Just remember that pound of gun powder on your reloading bench consists of 7,000 grains.

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