What is Grain (measure)?

Information about Grain (measure)

A grain (symbol: gr) is a unit of mass now equal to exactly 64.79891 milligrams, in all English mass and weight systems (avoirdupois, Apothecaries’ and troy).

An avoirdupois ounce is equal to 437.5 grains, whereas a troy ounce is equal to 480 grains. With the differing number of ounces in their respective pounds, an avoirdupois pound is 7,000 grains, whereas a troy pound is 5,760 grains. There have been other English pounds with round sizes in grains.

A metric or pearl grain is equal to 50 milligrams or 1⁄4 of a carat as used in pearl and diamond nomenclature.

Originally, a grain was the weight of a grain seed from the middle of an ear of barley; 64 wheat berries were set to weigh as much as 45 barleycorns (i.e., a wheat kernel was conventionally considered to be 45⁄64 of the grain used as a unit of mass). (A barleycorn was also 1⁄3 inch as a unit of length).

Usage

Grains are currently used in the United States and Canada[1] to measure the mass of bullets and gunpowder, and scales for handloading measure in grains; bullets are generally measured in increments of 1 grain, gunpowder in increments of 0.1 grains. Grains are used to weigh the tools involved in the sport of fencing, including the foil. Grains are used to measure arrows, and arrow parts [2] in archery. Grains are also used in environmental permitting to quantify particulate emissions.

Grains are used to measure the amount of moisture in air, a measure of absolute humidity

See also

References

1. ^ Marstar Canada: Ammunition and Reloading Supplies (English). Retrieved on Sept 21st, 2006.
2. ^ Canadian Tire en ligne : Magasiner au Canada (French/Français). Retrieved on Sept 21, 2006.
units of measurement have played a crucial role in human endeavour from early ages up to this day. Disparate systems of measurement used to be very common. Now there is a global standard, the International System (SI) of units, the modern form of the metric system.
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Mass is a fundamental concept in physics, roughly corresponding to the intuitive idea of "how much matter there is in an object". Mass is a central concept of classical mechanics and related subjects, and there are several definitions of mass within the framework of relativistic
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English unit is the American name for a unit in one of a number of systems of units of measurement, some obsolete, and some still in use. In spite of the name, it does not necessarily refer to the (non-SI) system of units still in widespread, but mostly unofficial, use in England
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The avoirdupois (IPA: /ˌævərdəˈpɔɪz/; French IPA: [avwɑrdypwɑ]
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The apothecaries' system of mass is an obsolete system formerly used by apothecaries (now called pharmacists or chemists) in English-speaking countries. The system is related to the English avoirdupois and troy systems, as they use the same mass for a grain.
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Troy weight is a system of units of mass customarily used for precious metals, black powder, and gemstones.

Units

The Troy

Although the troy was known to exist in medieval times, it was not until 1758 that it was established as the standard unit from which other
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ounce (abbreviation: oz) is the name of a unit of mass in a number of different systems, including various systems of mass that form part of English units, Imperial units, and United States customary units. Its size can vary from system to system.
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pound or pound-mass (abbreviations: lb, ℔, lbm, or sometimes in the United States: #) is a unit of mass (sometimes called 'weight' in everyday parlance) in a number of different systems, including English units, Imperial units, and United
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kilogram or kilogramme (symbol: kg) is the SI base unit of mass. The kilogram is defined as being equal to the mass of the International Prototype Kilogram (IPK), which is almost exactly equal to the mass of one liter of water.
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For other uses of the word carat, see Carat.


The carat is a unit of mass used for measuring gems and pearls, and is exactly 200 milligrams.
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pearl is a hard, rounded object produced within the soft tissue (specifically the mantle) of a living shelled mollusk. The finest quality pearls have been highly valued as gemstones and objects of beauty for many centuries, and the word pearl has become a metaphor for something
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Diamond is an allotrope of carbon. It is the hardest known natural material and the third-hardest known material after aggregated diamond nanorods and ultrahard fullerite. Its hardness and high dispersion of light make it useful for industrial applications and jewelry.
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H. vulgare

Binomial name
Hordeum vulgare
L.

Barley (Hordeum vulgare) is an annual cereal grain, which serves as a major animal feed crop, with smaller amounts used for malting and in
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Barleycorn may mean:
  • a grain of barley
  • English unit of length equal to 1/3 inch
  • John Barleycorn, an ancient folksong
  • William N Barleycorn, a Primitive Methodist missionary in Fernando Po
  • John Barleycorn (novel) by writer Jack London

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Motto
"In God We Trust"   (since 1956)
"E Pluribus Unum"   ("From Many, One"; Latin, traditional)
Anthem
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This page is currently protected from editing until disputes have been resolved.
Protection is not an endorsement of the current [ version] ([ protection log]).
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bullet is a solid projectile propelled by a firearm or air gun and is normally made from metal (usually lead). A bullet (in contrast to a shell) does not contain explosives, and damages the intended target solely by imparting kinetic energy upon impact.
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Gunpowder is a pyrotechnic composition, an explosive mixture of sulfur, charcoal and potassium nitrate that burns rapidly, producing volumes of hot gas which can be used as a propellant in firearms and fireworks.
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Handloading or reloading is the process of loading firearm cartridges or shotgun shells by assembling the individual components (case/shotshell, primer, powder, and bullet/shot), rather than purchasing completely assembled factory loaded cartridges.
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fencing is the art of armed combat involving cutting, stabbing, or bludgeoning weapons directly manipulated by hand, rather than shot, thrown or positioned (such as caltrops). Example weapons include swords, knives, pikes, bayonets, batons, clubs, and similar.
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Archery is the practice of using a bow to shoot arrows. Archery has historically been used in hunting and combat and has become a precision sport. A person practicing archery is called an archer, and one who is fond of or an expert at archery is sometimes called a
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English unit is the American name for a unit in one of a number of systems of units of measurement, some obsolete, and some still in use. In spite of the name, it does not necessarily refer to the (non-SI) system of units still in widespread, but mostly unofficial, use in England
..... Read more.
Imperial units or the Imperial system is a collection of units, first defined in the British Weights and Measures Act of 1824, later refined (until 1959) and reduced.
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U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units
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