I have enjoyed looking at the points that Huntsman22 posts and understand that they are likely the real "arrowhead". I guess the larger "arrowheads" that are found around here are much more likely to be blades or dart points. They are way too heavy and thick to be an actual arrowhead.
I have used a flint point hunting a few times and even with a modern bow the head needs to be very light to be at all practical. I shot this point through the chest of an 8 point white tail deer. The arrow penetrated completely and the arrowhead suffered no damage at all. I was amazed. It is only about 1/8th inch thick. While I made this arrowhead myself, it is about the size of the smallest point I had ever found prior to the point I showed above.
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Harry