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Main Boards => PowWow => Topic started by: 1hornhunter on January 14, 2011, 10:48:00 AM

Title: Spine Question
Post by: 1hornhunter on January 14, 2011, 10:48:00 AM
Im new to this traditional archery stuff and wondering if the spine is better to be a little more or a little less than the bow weight.  Example:  On most charts the 55 lb draw weight is listed on both the 50-55 draw and the 55-60 draw.  Im looking to order some wood arrows and want to make sure im going to get the proper ones.  Thanks in advance.
Title: Re: Spine Question
Post by: fish n chicks on January 14, 2011, 10:50:00 AM
I usually go with the over-spined arrows. Under-spined can lead to serious injuries or just bad shots. But i'm new too so I guess we'll both see what should be done!
Title: Re: Spine Question
Post by: lpcjon2 on January 14, 2011, 10:57:00 AM
First you need to figure out what you are drawing in length and even though the bow says 55lb @28" you may only draw to 26" or over at 29" and some bows like a more heavier spine than whats on the bow(poundage at your draw).Use Stu millers spine calculator.

http://www.heilakka.com/stumiller/
Title: Re: Spine Question
Post by: magnus on January 14, 2011, 11:10:00 AM
Any reputable dealer should be able to guide you in the right direction. I recommend using the sponsores on this sight. There are many factors involved for determining spine. As stated above. Draw length,bow weight, point weight, center cut of bow. Call a few sponsors and ask questions they'll be glad to help.

Keeping the Faith!
Magnus
Title: Re: Spine Question
Post by: Stumpkiller on January 14, 2011, 11:17:00 AM
It's almost always better to err on the side of overspined.  Especially with a center-cut riser and/or a recurve.
Title: Re: Spine Question
Post by: maineac on January 14, 2011, 11:20:00 AM
With over spined you can add weight to the tip to weaken the arroe, which for penetration purposes can be a good thing.
Title: Re: Spine Question
Post by: Lee Robinson . on January 14, 2011, 11:24:00 AM
With overspined arrows you can...

1. Leave them long
2. add weight to the tip
3. compress the shaft diameter slightly
4. sand the arrow

With underspined arrows (if not much underspined) you can...

1. Adjust your sight window by adding a piece of leather to create a need for more paradox
2. use a lighter weight tip
3. make flu-flus

With severely unspined arrows, you can end up with the 2nd half of your arrow in your bowarm/bowhand. No thanks.