Grains per inch ?

[flyguysc]

To figure grains per inch one divides the over arrow weight by length,which in my case it's 495 grs.arrow weight divided by length 27.5 bop which is 18 grs. per inch. Seems like a lot. So I'm I using the right formula? Using Ace 145 grs. heads with Sure wood Douglas fur shafts.

[BOHO]

Wood is always heavy

[slowbowjoe]

What poundage are you shooting? I think grains per pound is a better way to look at total arrow weight.

[KodaChuck]

Yep....think you are looking for grains per lb which is more meaningful....shooting 10 grains per lb would suggest a bow draw weight of approx.  49 lbs. What draw weight are you shooting?

[old_goat2]

And if you are wanting to know grains per inch, it's the shaft weight only, not tip, fletches or even the nock weight included, but like others eluded, it's probably grains per pound you're wanting to know.

[flyguysc]

I'm shooting 50.lbs DW @26.5"DL .Shooting a Howard Hill Black Mamba 66" asl long bow set @ 50.lbs @ 26.5" dl.

[flyguysc]

So it should be 9.9 Grs. per inch right? 50x9.9=495

[The Whittler]

FG, that's it.

[dbd870]

Yep, I never even look at gpi - all I care about is that the overall arrow weight is reasonable and it shoots well.

[smokin joe]

The grains per inch of a shaft is useful in planning out your arrow construction if you have a desired total weight range for the finished arrow.

The grains per pound figure (total finished arrow weight divided by the pounds of draw of the bow) is important in calculating whether or not your finished arrow id too light or too heavy for the intended use.

[flyguysc]

Yea its never been to much of a issue it's just that I'm going to the deer woods this year for the first time in a long time and wanted to make sure. Thanks