arrow building by the numbers?

[Blaino]

Arrow shaft
   (30.75" @ 12.0 G/lb)         =     369g
Brass insert                    =     100g
BH                              =     200g

 TOLAL ARROW WEIGHT       =  669g
 bow pulls 65# @ 30"      =  10.3 g/lb.


*Getting to a recomended hunting arrow weight (12-14 g/lb.) means I would need to shoot a 325g BH to have 12.2g/lbs if I'm figuring this right*

*I know I didn't count the fletching.*

What do you fellas think? Am I doing this right?

[scedvm]

Blaino, I would leave it just where you got it now if its tuned well.  A 670gr arrow at that poundage is more than adequate.  I know these topics get a lot of debate but I mostly am an elk hunter and I like to shoot 9-10gr/lb from my bows which results in a 520-620gr arrow for me usually.  I do not like the loss of speed with the ultra heavy arrows.

[Blaino]

I have a few arrows built with 200g and a few 250g field tips.  I can't notice that big of a difference. The seem the 250g hit harder though.  Maybe I should just split the difference and go 225?....Ashby report makes me think and want to tinker a lot even though I know lighter arrows will work just fine.

[JimB]

Changing point weight changes dynamic spine and tune of the arrow,even if you don't see it.Fletching hides a lot of flaws.If you bareshaft and change point weight like that,you will see the difference.The same goes when you shoot broadheads.

You can't just arbitrarily add a lot of point weight to get a certain arrow weight or FOC without increasing shaft spine-IF you are tuned now.If you haven't tuned them,read the tuning information at bowmaker.net.Most people would be very happy with the weight you have now.You would be in good shape to hunt anything on this continent.

Nothing wrong with tinkering as long as you have a plan.

[Blaino]

I have read this front to back and sideways.
  http://www.acsbows.com/bowtuning.html

I can bare shaft 200 and 250 the same out to 20 yards or so. I know the arrow will fly stright with even more weight up front.  I really asking more about the trajectory of the arrow in flight.

[Bjorn]

Trajectory seems to bother some and others not so much, it must be personal thing, at least it seems that way to me. My arrows are 12+ gpp and I don't notice it at 20-25 yds. I have tried to 'measure' trajectory and the drop at those distances is nutten. As long as your set up is well tuned that is what counts most.

[Night Wing]

Blaino,

Your 10.3 GPP arrow is good to go for anything including elk. if it was me shooting your poundage, I wouldn't change anything arrow wise with regards to GPP (grains per pound).

With that said, my 42# recurve; for deer, small feral hogs and javelina, shoots a 10.02 GPP arrow. My arrow is also "good to go" for the species I bowhunt.

[Javi]

Personally I let the bow tell me what it wants to shoot, the same way I let it tell me the brace height it wants..  You may be fine as you are, but the only way to be sure is to experiment with different weight arrows until you find the “match”

[Blaino]

Bjorn,
What is your BH set up?... to get your arrows to that weight.