question for you tuning gurus....

[jacobsladder]

in your opinion based on experience.........are bows with less r/d that string d shaped less critical of arrow spine and tuning? Just curious of your findings thru experience...I often thought that riser depth may be most important aspect of tunability, but starting to wonder if heavier r/d begs stiffer spine regardless of riser depth...........................no debates here...............just your experience..thanks!!!!!

[JRY309]

The bows with a riser cut past center are less critical of arrow spine in my experience and usally require a stiffer spine.D-shaped bows are usally cut off center and are more critical of proper arrow spine.I think how the riser is cut plays a big importance in proper arrow spine.

[James Wrenn]

Amount of centershot is the biggest variable but with a bow cut past center it can always be changed easily.If not cut to center you are stuck with what you have.My bows are cut deep enough I can shoot 600,500 and 400 spines from most all of them even though most are under 45lbs.All it does is give me more options with arrows.I was able to use the same arrow and broadhead from a selfbow,b/osage bow and an ilf risered recurve useing a flipper rest during hunting season.Amount of centershot allowed me room to tune that way.There was over 25fps difference in performance in the 3 bows but all were tuned to shoot bareshafts out to 40yds.

[jacobsladder]

Im trying to make sense of my findings tonight...

shooting a mild r/d cut to center pulling 48#s i was able to get 600s to bare shaft acceptable, and 500s to bare shaft great.

shooting a heavier r/d not cut to center pulling 45#s...600 veered weak all day.........but 500 was acceptable, but not perfect...

.600 was 28 1/4 175 grains up front
.500 was 29" 175 up front


  :confused:

[James Wrenn]

Weak arrows are an easy fix.    

Just build out your sideplate a hair to change the centershot until it tunes.The second bow would need very little change to shoot either arrow perfect.A 32nd of an inch goes a long way in tuneing centershot on a bow.I often use layers of tape or a bandaid to bring one out to see what I need before useing something more permanent.

[jacobsladder]

thanks James...im just confused to why the 48# bow would be more forgiving of the lighter spine ..than the 45#er......no big deal..i'll be able to make both work.....thanks again for everyones help and input!

[daveycrockett]

Sometimes bows ain't what they are marked, could be a smidge of centershot one way or the other also.

[Earthdog]

I belive bows with strong R/D require a stiffer arrow that a straight limbed bow of the same draw wheight.
Centershot,,the less the bow has,the weaker in spine the arrow needs to be to flex around the riser.
Perfect or past centershot means you can shoot a stiffer arrow.