I made a ratyhr cool training device - a marati - for Indian martial arts by taking two Chen hewing spear heads and fixing them to either end of a wooden haft, making a doulbe headed spear. I then sharpened the blades.
I took it along to the Gunpowder Mills event, and left it there with the swords for some test-cutting, if someone wanted to have a go.
They did, and one of the heads bent at the neck almost at right angles, by striking a plastic bottle of water.
It didn't cut the bottle, either.
So I would recommend Chen spearheads for
waving at targets, but not actually throwing at them.
If uoi want something functional, why not get something from one of the Czech makers?
http://www.kovex-ars.cz/armoury/ehalapar.html
Hell was boring so I came back.