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View Full Version : How do you figure total grain without scales



J758
03-05-2010, 11:44 AM
I was wondering how to find total grain

bfisher
03-05-2010, 01:20 PM
Weight of what? Your arrows?

Visit the arrow manufacturer's website. Find the GPI (grains per inch) of the shaft you are using and the weight of the components. Multiply the GPI times the length of the bare shaft. To this add the insert and nock weights. Add the weight of the fletching and the point. Add about 3 grains for the fletching glue. ---------Then total it all up.

Dave308
03-06-2010, 02:19 AM
You can get a scale on e-bay for about $10.00, well worth the money.