I have been messing about with different shafting material. Dowels are nice. You do have to sort through them on a rate of about 10 to 1 to find good ones. I bought a batch of 500 Tonkin bamboo stakes to experiment with bamboo shafts. About 40% of the batch are too crooked or too stiff to make a usable arrow. The thing with Tonkin bamboo stakes is that they seem to be bred to be strong, so a shaft that is just barely 5/16" may be 40#, 50#, 60# or 80#. I have found any number of bamboo in my selection that spine out way over 125#. At this point I do a rough spine test on the bamboo before I do anything with them. There is no point in making up a good looking arrow that has a spline weight of 85# if you are shooting a 45# bow.
I think the River Cane is probably the best, but it doesn't grow in Indiana.
The advantage of the Tonkin bamboo arrow is that it is tough. Shoot into trees, rocks, dirt, plywood. Pull it out, it's still good.