Man I thought I had it.  osage 53: ntn, good osage, rigid handle (6" between fades),  clean ring on back, 1 3/16" wide, sinewed, flipped out tips, had it at about 70# at 25" with nice eliptical tiller.  Goal all along was to go 27". full draw for me.  Took it out all the way and it went into 3 pieces.  tension fracture that sheared clean across sinew 10" from upper tip, spalled off foot-long shard from belly, with shard, tip, thrown into opposite directions.  I'll put up a pic for scentific documentation.
Dave