Many of what folks call arrowheads from primitive times were actually atlatl heads. The atlatl came between throwing spears and arrows in the evolution of projectiles, basically they were feathered darts, longer than arrows but shorter and lighter than spears. Bows and arrows came into existence about 15,000 years ago, worldwide. Before that atlatls, before that throwing spears and before that lunging spears.
I've seen some pics of stone points embedded in bone, some from each of the above weapons. If the connection is properly and securely made it is a viable killing machine.