I generally don't use fore shafts with cane. I just fill the void in the cane with a dowel and taper then and add field points. I have some practice arrows from Art Butner that have fore shafts but they are permanent. Art tapers the foreshaft to about the same taper as for field points, hollows the cane to match the tapered foreshaft and super glues the foreshaft in. Then he serves around the cane with silk thread soaked with super glue. I have been shooting 2 of these arrows for over 2 years and the fore shafts are still in and the arrows shoot as well as they did the day I got them.
If you want the fore shafts to come out when they hit, use a sand pile to practice on. Pat