The result of your conversion between inch ounce and grain/cubic inch appears here
To convert between Inch Ounce and Grain/cubic Inch you have to do the following:
First divide 0.0070615518 / ((0.45359237/16)*(192/175)/480)/(0.0037854118/231) = 0.0017858
Then multiply the amount of Inch Ounce you want to convert to Grain/cubic Inch, use the chart below to guide you.
Symbol: in oc
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Symbol: gr/in³
No description