Sharp is what a broadhead is designed to be. The sharper a head is the more damage is done with less trauma. When a body experiences trauma it immediately tries to fix the situation by sending coagulants to that area and will result in less blood loss.

As far as stone heads are conserned, there have been obsidian heads whose cutting surface was measured at 5 microns in width and to put that into perspective a surgeons scalpel on average is 25 microns in width. That puts the stone head 5 times sharper than a scalpel.

Also many native tribes believed that an arrow that missed held some sort of bad mojo and would never be reused.

Rogue