Stu's calc doesn't match my result

[Javi]

Originally posted by FrankM:
This is how it began. A few days ago, I found that my inputs were wrong. My arrow rest was measured incorrectly. When I fixed that, my bow and arrows were 66.2 and 66.4 dynamic spine. The arrows flew great!  Then just for funzies, I put more grains on the point, and they still flew great, and seemed to be more "laser like" with each increment in point weight. That was what caused me to make this post. I can shoot the 145 gr. points and they'd be fine. But I'm kinda seeing no reason not to up the point weight.

As a note: the cleaner your release the "weaker" spine you can shoot..

[FrankM]

Originally posted by Javi:
As a note: the cleaner your release the "weaker" spine you can shoot.. [/QB]

Hmmm, maybe I'm just getting better?  Things to ponder.

[Jason R. Wesbrock]

Rob,

Well said! Spine chart, calculators and such, they are there to get a shooter in the ballpark. They should never be used as a substitute for proper tuning.

[CEO]

One could always use the personal calibration factor (+/- 15#). Of course, that would tend to indicate the calculator has a margin of error of +/- 25% for a 60# bow.

[jamesh76]

Originally posted by kat:
  However, there are a lot more positive results than negative.

I believe the calculator is a great tool. It will get you close enough to fine tune. However, IMHO I believe that the quote above best refers mainly to people who are new into traditional archery and don't quite understand the tuning process very well. At least that is the way I was when I first started and used the older version of the calculator. Sure it has improved a ton, but I also think most people put the numbers in by more guesswork than actual facts.

Just my 2 cents.

James

[ishoot4thrills]

Originally posted by Swamp Yankee:
Make sure the center cut and plate thickness numbers are correct for your bow; it makes a big difference.

Exactly! Can't emphasize this enough! How many people say the calc. doesn't work right because they fail to enter the correct measurement for cut-to-center? How many people go to the trouble to actually measure it and see just what that measurement is?

   

[FrankM]

I think the calc is good, it helped me figure out some arrows I was sold were completely incorrect for me (I couldn't tune them). It also helped me understand the relationship between everything. I assume in time, I'll also understand the current issue I have. No doubt it's a good tool.  Thanks for all your help!