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Gn (sometimes Gr) is a very old unit of measurement called "Grains".

It is based on the approximate weight of a single grain of wheat (or other cereal).

Grains is the unit of measurement traditionally used in Apothecaries.

In more recent times, Grains has been used to measure gunpowder.

1 Grain = 0.0648 grams

1 Grain = 0.0023 ounces

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Daniel McMahon

Lvl 2
2y ago

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