Tracy, I have not read that particular piece by Jimm Hamm but i did steal the idea from TBB3 in the chapter he wrote on the subject. From the chapter, excuse my paraphrasing from memory, when these grooves are cut into the shaft before heat straightening it creates ridges that get hotter than the oher parts of the shaft and these help hold the shape applied to the wood. maybe i have a placebo effect working on me with this but it seems to help so i keep doing it.
Fred Arnold, I am trying to get pictures up of a lot of things. this weekend I am having a friend help me understand the technology I own and cant seem to operate. Ill try to get some up of arrows I have grooved.
John