Calculate Arrow Spine Strength.

Grumpy

The Grumpy Grease Monkey mechanical engineer.
Staff member
when selecting your arrows the flex in the arrow you select to use,
must match the application,

especially if you want to hunt with decent broadheads,

as they are considerably heavier than field tips.
generally, the higher the number on the arrow spine strength chart,
the LESS poundage the bow has that matches that arrow,
look at the charts carefully

the example,
I generally shoot a 31" length draw arrow on an 87 lb bow,
thus I want a spine strength in the 150 or at least a 200 stiffness range
Id buy 2 dozen new carbon shaft arrows, they won't get bent .
(they easily take far more abuse, without being bent or damaged and yeah,
they can be damaged but generally they last far longer and just need re-fletching occasionally)
well worth the extra cost in my opinion, be sure the spin stiffness matches the bow poundage)
I generally shoot a 31" length draw arrow on an 87 lb bow,
thus I want a spine strength in the 150 or at least a 200 stiffness range, this is critical to good results in a hunting arrow selection

https://www.amazon.com/Hunting-65-80Lb-Compound-Recurve-Practice/dp/B08FBDGQ5X?th=1

these seem to be about the best broadheads I've found for elk hunting in decades

4225-3x.jpg


www.3riversarchery.com

Woodsman® ELITE Series 3-Blade Screw-In Broadheads

Check out the deal on Woodsman® ELITE Series 3-Blade Screw-In Broadheads at 3Rivers Archery Supply
www.3riversarchery.com
www.3riversarchery.com

Gold-Tip-Chart-2.jpg




get a good grip:rolleyes:
on the nearest wall,
before you ask the price at your local archery shop,
on a dozen high-quality, carbon arrows
and you damn sure better own a fletching
kit and dozens,
of spare vanes and glue

your 100% certain to damage the vanes/fletching during practice so be prepared to do repairs on torn or damage vanes!
I generally carry at least 5-8 arrows on a hunt and 7-8 spares in the truck and all your arrows must match for consistent accuracy


https://www.gohunt.com/read/how-to-selecting-the-perfect-arrow#gs.fdfj15

https://www.advancedhunter.com/arrow-selection/

https://www.3riversarchery.com/pdf/ArrowCharts.pdf



Compound-chart-2015-12-12.png

https://www.goldtip.com/Resources/Spine-Chart.aspx
Gold-Tip-Chart-2.jpg


*Point Weight = The total combined weight of point, insert, Ballistic Collar and FACT weight.

CompoundMinusChart.png

CompoundPlusChart.png

RecurveChart.png


Step 1: Find your draw and point weight in the chart.

Step 2:
Determine the length of your arrow by measuring from the throat of the nock to the end of the insert.

Step 3:
Find the correct group number in the shaft selection chart.

Step 4:
Find your appropriate spine selection for your bow and use the detail arrow specifications chart on the next page to see which shafts are available in your spine. Arrow length is measured from the throat of the nock to the end of the insert. If you are shooting a longer broadhead than field point, you may want to choose a slightly stiffer shaft.
 
Last edited:
I'm having an issue finding the correct replacement arrows at anything like a decent price.
can anyone point out a decent place to buy new arrows or arrow shafts
I generally shoot a 31" length draw arrow on an 87 lb compound bow,
thus I want a spine strength in the 150-200 range.
Ive used the same 18 arrows for 3 decades and can't remember where I purchased them
I recently seem to have misplaced all but 5, so Ill be purchasing two dozen more 200 spine strength 31" carbon fiber arrows in the near future
I am 100% certain the prices Im currently quoted are absurd, at well over $240 for 18 new bare carbon shafts

https://www.goldtip.com/Resources/Spine-Chart.aspx

Compound-chart-2015-12-12.png
 
Last edited:
Back
Top