I don't know anything about bow speed, but you can convert grain to grams using this page:
http://www.convertunits.com/from/grain/to/grams
1 grain = 0.06479891 grams
| Current Thread... | |
| 06/21/2008, 9:38 AM | Kinetic Energy |
| 06/21/2008, 11:49 AM | Re: Kinetic Energy |
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