kickin_buck

This type of posting is exactly why I love the internet. Here ogg got some very good (if not great advice) about building an arrow. He got this because people with more experience were willing to share their knowledge and have an open discussion about the topic.

Just wanted to point out a post that really illustrates what a great tool sites like this can be.

treboryerf

I couldn't tell you how many gpi my arrows are,I just know I wanted to shoot a 125 bh for more foc matched with a relativly heavy arrow properly spined that would shot great out of my bow.Love a moderatly heavy setup somewhere in the middle of light and really heavy,I think I get the best of both worlds with this type of setup,light enough to get decent speed and heavy enough to be forgiving and hard hitting without giving up much in arrow trajectory or drop.

Cougar Mag

I wholeheartedly agree that picking the correct spine is the first step when picking arrows, but then I go on from there and decide what total weight arrow I want to hunt with after seeing what arrows are in the correct spine. For me I prefer at least an 8.9 GPI(bare shaft) on up within the correct spine.

GMMAT

I hate to harp on this again.....

But the "correct" spine is dependent upon the tip weight and the overall arrow length also being correct (also DW). You can maniulate spine by changing either. If you know the length arrow you need (with a compound you should have a good idea), then you have (unless I'm missing something) only a few things that can affect arrow spine:

1. Center shot
2. Nock Point
3. Draw weight
4 And the biggie.....TIP WEIGHT.

You can pick the arrow (at the correct length); set the center shot and nock point correctly and throw your spine off by picking the wrong tip weight.

That's why I asked.....Why not pick the tip you wanna use and work backwards?