RE: 100 or 125 grains to get good spine and FOC
 

Yep I think he was trying to say under spined! Ausi has or is inprogress of building me some archery ammo and the FOC is up around 19-20%! He knows what he's doing so I'm trusting him...if they wobble like a fat woman at a buffet I'll cry and just blame it on my poor shooting.:DI can already prepare to adjust my sights since I'm shooting stock 340's and some 400 spine with 100 gr field points,but I'm still learning and hoping to select BH's for hunting soon.

RE: 100 or 125 grains to get good spine and FOC
 

Ausie-guy is correct that the 5575's are underspined . Also adding 25 grains to your point does change your FOC quite significantly actually ,2.3% more . Here is what OT2 showed and this was just with the 100 grain points so the 125's made the spine even worse Here is a pic

RE: 100 or 125 grains to get good spine and FOC
 

Offshootboy is under spined.

RE: 100 or 125 grains to get good spine and FOC
 

Those charts are only a ball park figure and IMHO they are totallymissleading.

I had a gentleman pm me yesterday about his set up 70lb, 27.5" draw and 27" arrow (5575),when I ran his numbers the spine was weak.

I suggest that if the chart say's you need a 5575 (400 spine) arrow go to the next stiffest.

This is one of the reason most people have trouble tuning their bows.

RE: 100 or 125 grains to get good spine and FOC
 

Couldn't agree more Aussie. Especially if you are shooting a drop-away. What I have found a drop-away rest prefers a stiff spined arrow.

RE: 100 or 125 grains to get good spine and FOC
 

Why don't the arrow companies include a disclaimer in their charts?

Thanks for the PM help AussieGuy!

RE: 100 or 125 grains to get good spine and FOC
 

Alright Thanks guys I guess Im going to have to buy some more arrows.


How can I get some software like that so i can run some numbers before I buy somthing that aint gonna work again, or at least I know it will.

The arrows dont fly that bad, I robbin hooded one on sunday, that was my first time ever.

RE: 100 or 125 grains to get good spine and FOC
 

No worries Kevin;)

Good question I just wish I had a good answer.

RE: 100 or 125 grains to get good spine and FOC
 

This is the only place anybody refers to a sizing program,you go to most bow shops they scan through a chart and sell what they have in a box,if it wasn't for pictures they couldn't sell anything! Here you get practical advice and multiple opinions to help guide you!

RE: 100 or 125 grains to get good spine and FOC
 

I use Archers Advantage

http://archersadvantage.com/AdPages/AAIntro.htm