Assuming that it is from your area, contact the local museum, they can help i.d. the TYPE/Style, thus getting the aprox. period of time, of when it was made.
Indians were good at the "kill shot". Otherwise it was a long chase and a long way to pack all the meat back.
But you can see the problem when it came to the heart and lung shots ... ribs.
When a stone projectile strikes bone it often knocks one edge of it's tip off, depending on the angle of the glancing blow.
This is not uncommon to see on ancient points ... the severe ones would often be discarded ... but a minor break might be sharpened along the broken part and continued to be used ... many were used as knives if the balance was too far off.
The question is, when you look straight on at that missing edge, does it look like a long flat smooth very narrow ski jump ? That would be the typical Impact Fracture.
If, however, that edge looks very similar to all the other edges, that would tell you that the impact fracture was resharpened and the piece was used again.
I can't see that important edge, that is why you have to look at it and say if it is the red or the blue in the diagram.
Is it smooth and flat like a long narrow ski jump ?