The result of your conversion between grain/cubic inch and grain/ounce [US] appears here
To convert between Grain/cubic Inch and Grain/ounce [US] you have to do the following:
First divide ((0.45359237/16)*(192/175)/480)/(0.0037854118/231) / ((0.45359237/16)*(192/175)/480)/(0.0037854118/128) = 1.8046875
Then multiply the amount of Grain/cubic Inch you want to convert to Grain/ounce [US], use the chart below to guide you.
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