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Changing weight up front / spine
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Topic: Changing weight up front / spine (Read 301 times)
geno
Trad Bowhunter
Posts: 675
Changing weight up front / spine
«
on:
July 26, 2009, 10:22:00 PM »
If you go from 125 to 160 with same length shaft how much spine would you loose ? Thanks
G
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"Learning how to shoot a bow is easy if you learn the right way"..Howard Hill
Mo. Huntin
Trad Bowhunter
Posts: 734
Re: Changing weight up front / spine
«
Reply #1 on:
July 26, 2009, 10:40:00 PM »
Whatch got going on bud?
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geno
Trad Bowhunter
Posts: 675
Re: Changing weight up front / spine
«
Reply #2 on:
July 26, 2009, 10:58:00 PM »
I am going to Buy some shafts for my old longbow in the am. I was shooting 125 up front and now I want to shoot 160 up front. I was wondering how much in spine do I need to go up. I was shooting 45-50 I dont't know how much you loose when adding another35 gr. up front. Thanks MO.
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"Learning how to shoot a bow is easy if you learn the right way"..Howard Hill
Mo. Huntin
Trad Bowhunter
Posts: 734
Re: Changing weight up front / spine
«
Reply #3 on:
July 26, 2009, 11:08:00 PM »
I am not an athority on this but in my experience I have been able to shoot a wide range of point weight just by increasing or decreasing the thickness of my side plate. I like to use those felt furniture pads from wal mart. I think it will in actuality make a difference but I don't know if you or I would really be able to tell much difference in 30 grains. My bow has enough shelf I can really do a lot with it. I can shoot atleast anywhere from a 100 grain tip to 175 grain tip on my bow by changing the side plate.
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Mo. Huntin
Trad Bowhunter
Posts: 734
Re: Changing weight up front / spine
«
Reply #4 on:
July 26, 2009, 11:09:00 PM »
I guess I can't even spell Authority.
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geno
Trad Bowhunter
Posts: 675
Re: Changing weight up front / spine
«
Reply #5 on:
July 26, 2009, 11:16:00 PM »
This bow is not cut to center..I think I will get50-55 and start out full length and go from there..This is a bow I will just use for target shooting. It has really been a couple of yrs since I shot it but I would like to start. I Think I will pick up a reel for it in the am also.
G
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"Learning how to shoot a bow is easy if you learn the right way"..Howard Hill
Mo. Huntin
Trad Bowhunter
Posts: 734
Re: Changing weight up front / spine
«
Reply #6 on:
July 26, 2009, 11:26:00 PM »
Where you at in MO.? Good luck bud.
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geno
Trad Bowhunter
Posts: 675
Re: Changing weight up front / spine
«
Reply #7 on:
July 26, 2009, 11:30:00 PM »
Rolla
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"Learning how to shoot a bow is easy if you learn the right way"..Howard Hill
Mo. Huntin
Trad Bowhunter
Posts: 734
Re: Changing weight up front / spine
«
Reply #8 on:
July 26, 2009, 11:40:00 PM »
Sounds like you are talking about wood arrows also, I am talking about aluminum wonder if they react different? One of these days I am going to try the wood arrows, kind of seems like a lot of work though but I want to try them.
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geno
Trad Bowhunter
Posts: 675
Re: Changing weight up front / spine
«
Reply #9 on:
July 26, 2009, 11:49:00 PM »
I still have some 2018 around that I shoot with my striker but mostly carbon now. I do like making woodies...I just hate when they break.
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"Learning how to shoot a bow is easy if you learn the right way"..Howard Hill
sagebrush
Trad Bowhunter
Posts: 733
Re: Changing weight up front / spine
«
Reply #10 on:
July 27, 2009, 12:19:00 AM »
From the books I've read they say 25 grains up front makes the same difference as one inch of shaft length or 5 lbs. of bow weight.Gary
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Zbearclaw
Trad Bowhunter
Posts: 702
Re: Changing weight up front / spine
«
Reply #11 on:
July 27, 2009, 01:51:00 AM »
I would play with the dynamic spine calculator to see what the spine rating is for your old arrows, then try and match that with the new head weight.
Disclaimer:
I know nothing about wood shafts, or much of anything else for that matter, but my "thinking face" makes me look like I look like I know what I am talking about!
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Give me a bow a topo and two weeks, and I guarantee I kill two weeks!
longstiks
Trad Bowhunter
Posts: 425
Re: Changing weight up front / spine
«
Reply #12 on:
July 27, 2009, 03:47:00 AM »
It's going to depend on how spine sencitive your bow is. My bow will shoot 60-65 or 70-75 woodies.
It's a strong R/D longbow #57@31".
Denny
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moebow
Trad Bowhunter
Posts: 2509
Re: Changing weight up front / spine
«
Reply #13 on:
July 27, 2009, 09:50:00 AM »
Geno, The direct answer to your question is: add 5# for the increase of point weight from 125 to 160. So If you're now shooting 45-50# spine groups, the next step up will be 50-55#. If everything else stays the same you'll be right there.
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Trad Bowhunter
Posts: 4523
Re: Changing weight up front / spine
«
Reply #14 on:
July 27, 2009, 08:16:00 PM »
Going from 125 to 160, you might be alright with your old spine and you might not, depending on how close you were to start with. The safe thing is to order the next spine up and cut them an inch long. You can always shorten them if needed.
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