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Author Topic: Point weight affect on spine  (Read 1550 times)

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Offline Ifrit617

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Point weight affect on spine
« on: December 30, 2012, 12:24:09 pm »
Hi guys,

I am curious what point weight's specific affect on spine is. I know the rule of thumb that a heavier point weakens the spine, but is there any specific formula? I have heard that every 15 grains or so above 125 grains reduces the spine by 5# and was wondering if this was accurate?

Jon
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Offline Pat B

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Re: Point weight affect on spine
« Reply #1 on: December 30, 2012, 01:45:10 pm »
Jon, I think that is the formula...and of course less than 125 will increase spine.
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Ifrit617

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Re: Point weight affect on spine
« Reply #2 on: December 30, 2012, 02:03:29 pm »
Naturally ;D. Thanks for confirming this.

Jon
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Offline madcrow

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Re: Point weight affect on spine
« Reply #3 on: December 31, 2012, 06:36:26 am »
Yep, I was playing around in the shop with some different sized trade points one day and had to make an arrow that spined at 100 pounds to shoot a 275 grain trade point off of 50 pound bow.
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Offline PEARL DRUMS

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Re: Point weight affect on spine
« Reply #4 on: December 31, 2012, 08:51:40 am »
Jon I will be honest and tell you unless its 40-50 grains more, you will never notice with a selfbow at hunting distances. I have arrows with 125, 145 and 160 on them, the 160 is BARELY more quiet than the other two, POI is the same at my skill level.
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