The result of your conversion between Iron and grain/cubic inch appears here
To convert between Iron and Grain/cubic Inch you have to do the following:
First divide 7658 / ((0.45359237/16)*(192/175)/480)/(0.0037854118/231) = 1936.63962314
Then multiply the amount of Iron you want to convert to Grain/cubic Inch, use the chart below to guide you.
Symbol: iron
No description
Symbol: gr/in³
No description