ORIGINAL: Straightarrow
Ever since I've built my spine tester, I've been a bit amazed at the variation in spine among a dozen carbons. Most dozens will show at least a .030 difference between the stiffest and weakest arrow in a group.... I've measured some dozens where the vaiation was .065. That's incredibly huge variation, that can't possibly result in a consistant shooting dozen. If you're shooting borderline spined arrows, you are not likely to get the same point of impact from such variation, when shooting broadheads. I have found certain brands to be less consistent than others and have found the lower tolerance for-straightness arrrows to be less consistant than the higher end ones in most cases. This makes sense that a straighter arrow is also likely to test more consistant with spine. Aluminums shoot so good, because they are not only very straight, they are very consistant with spine. Seldom can I measure more than a .005 difference in a dozen.
This says it all. Great post SA. (I added the bold face). I think most folks would be appauled at the crap many manufacturers sell us under the guise of "quality" gear.
I'm curious how many people who are not worried about cheap carbons would tune your bow up for XX78 2314's, and then shoot a mix of 2314's, 2315s, 2413s, and 2219s out of it?
That's essentially what you are doing if you shoot a dozen carbons shafts which vary up to .065 in spine...