I had 3 dozen BRAND NEW shafts that I decided to put on the spine tester and I was very surprised. The stiffest one was .342 and the weakest one was .371. That in itself semed like a large variance to me but the biggest surprise I got was that not a one of them was even close to .400 like was printed on the shaft.
It was an eye opener.
Bisch [/QB]
Rod Kelley here in the Flathead (Mountaintop Trad Arrows) told me that this is the issue with ALL carbons. He said he made some calls and did some digging and the industry all agreed to measure spine on carbons at 28" instead of 26".
He now has a spine tester that is setup at 28" and he says that puts all carbons out there right close to where their published spine is.
I've bought a lot of GT shafts from the old boy, and I always check them for spine. I've not found any variance in them. Not like you describe... I do find that interesting...
And lastly... On a Silvertip, cut 3/16ths past center, the MFXs are just slightly inboard of center with my shelf rest. They don't shoot too good that way. I stuck with GTs