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Discussion Starter #1
I'm playing with some arrow combos for my monster on AA and I just had a quick question on spine. I have a monster 6 shooting a 71# and 29", it suggests a .300 spine arrow but some .300 spine arrows show optimum spine and other .300 spine arrows show weak spine. Whats the diffence?? Why doesn't .300 mean .300???
 

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You're correct that 0.300 spine is 0.300 spine.

When you select arrows, you need to be careful as some manufacturers still have model numbers like 100, 200, 300, 400...which have no relation to spine.

Examples...

Carbon Express 250 = ~0.400 spine
PSE Comp Pro 300 = 0.359 spine
Pre-2008 Victory 300 = 0.400 spine
Patriot Pro 300 = 0.345 spine
 

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Discussion Starter #4
You're correct that 0.300 spine is 0.300 spine.

When you select arrows, you need to be careful as some manufacturers still have model numbers like 100, 200, 300, 400...which have no relation to spine.

Examples...

Carbon Express 250 = ~0.400 spine
PSE Comp Pro 300 = 0.359 spine
Pre-2008 Victory 300 = 0.400 spine
Patriot Pro 300 = 0.345 spine
Yes. I understand how arrow manufacturers work! Archers Advantage will list all the possible arrows at the bottom of the page. They all have a .300 spine but some will say slightly weak and some will say optimum spine even though they are all .300 spine. Thats what I don't get. And they are all set up the exact same way.
 

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PSI, wouldn't it be nice if they made an industry standard for spine relating to the deflection on arrows. That way if you looked at any arrow and it said,.400, .340 etc. you knew right away it was the spine rating instead of the way some of them are now.
 

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My best guess is that the arrows that are showing as underspined either have heavier inserts or lighter nocks, bushings, etc. Either way will effectively lessen your spine.
 

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Discussion Starter #7
My best guess is that the arrows that are showing as underspined either have heavier inserts or lighter nocks, bushings, etc. Either way will effectively lessen your spine.
thats what I initially thought to, but none of those change when you just change the arrow shaft. You have to into the setup page and change those seperately. I just don't get it.
 

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Discussion Starter #8
I emailed AA directly and this is the response I got. Just thought I'd share it with anyone interested.

Justin,

The .300 spine refers to the Static Spine of the arrow (deflection of shaft when loaded over a 28" span).

Archer's Advantage takes into account Dynamic Spine, which is a combination of Static Spine and Grains Per Inch.

Perry
 
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