For general shooting and/or hunting, parallel wood shafts in 11/32" or 23/64" are a good choice, performing about as well with less expense than tapered shafts. Just like you don't need space-age plastic shaped like a soda straw to get good results with your traditional bow, neither will you need rare and expensive exotic woods cut by forest nymphs from virgin timber near a clear mountain stream. Most any straight-grained, commonly-available shaft material like cedar, spruce, ash, birch, southern pine (chundoo), etc. that is spined for your bow, properly fletched and mounted with a no-wobble tip and nock will give good results.
Shooting wood arrows is fun. Making and using your own wood arrows is also inexpensive and quite rewarding, especially when walking up to your first game animal (or second, or third, or...), felled with a well-placed, hand-crafted wood arrow that you built yourself.
Wood puts tradition back into traditional archery.