Good points by both above. I make my wedges using white oak, the toughest and strongest hardwood I can find. They are used here by loggers dropping huge cottonwood trees. Yes, they will pound on them occasionally hard enough to beat them up. However, I have a couple of plastic wedges sold by Baileys and others that suffer the same abuse. In time, they chip, crack and give up also. It just may take a little longer.
If you have not tried a good felling wedge made from white oak, hickory, or yellow birch, it might be worth considering.