I love sourwood for arrows...and honey! Most of my hunting arrows are sourwood. I also use cane, red osier dogwood and viburnum. All make excellent, tough, hard hitting arrows.
I use self nocks with cane(all of my arrows now) but wrap below it with sinew and I haft stone and trade points directly in the cane with no inserts or foreshafts. Never had a cane arrow split even after hitting rocks or trees. I even taper cane and mount store bought points. Use a sander type taper tool though. Pencil sharperner type will split cane.