New to firearms. What and how is "grain" defined in ammo


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flampy
March 28, 2005, 03:08 PM
I've looked over the web and can't find an article discussing what exactly is ammo grain and how each grain amount differs.

Thanks

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dolanp
March 28, 2005, 03:12 PM
A grain is a measurement of weight and 1 ounce = 437.5 grains. HTH!

P0832177
March 28, 2005, 03:12 PM
Grains refer to the wt of the bullet. There are 7000grs to a pound, or about 437 to an ounce or so. Bullet wt is pretty eveident from there. And, it relates to charges of powder when reloading.

RyanM
March 28, 2005, 03:47 PM
One thing you should be aware of is that when loading black powder, "grain" refers to a unit of volume, not weight. In other words, a 70 grain charge of Pyrodex or other black powder substitute will occupy the same amount of space as 70 grains in weight of black powder, regardless of the actual weight of the Pyrodex charge.

Tinkerer
March 28, 2005, 03:51 PM
"Grain" is actually an old British unit of weight used to measure wheat. There are approx. 7000 grains of wheat to a pound. This unit of measure is used to refer to the weight of powder and the bullet. Your reloading manuals all deal in grains. When you start reloading, be sure you obtain a scale calibrated in grains. Converting to/from ounces or some other unit of weight can be dangerous. :what: :eek:

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