the difference between good osage and REALLY good osage. After handling and working what I would consider my fair share I have come to realize there are drastic differences from tree to tree. The darker orange, thin ringed stuff is just plain mean compared to the pale yellow stuff. Either make fine bows. However the dark orange, thin ringed stuff takes a sliver to make a 55# bow. The bow that prompted this topic is a turkey bow Im whittling on that is 59" ntn and 1 1/2 wide, rigid handle. Its a mere sliver of wood now and still all of 70#'s at 28". Of course Im only guessing, I havent pulled it past 35#. Its the second bow from the same tree, the other was "Twisted Sister's" that I posted a while back. That bow was also a sliver of wood by the time I got to 50#. I have built many other similar styled bows that must have had 1/4-1/3 more wood involved. Not to mention the darker stuff seems to stay put much better after a heating session. When it boils down I feel the less wood needed to achieve the same draw weight the better the bow shoots and the longer it will last and hold reflex.