Adrea; I have made some nice bone points. I personally like to keep them at least 1/4" thick. Then I shape them in the style I want, Usually triangular, and then I thin them down from the middle towards the edge. Leaving it looking like a diamond shape looking from the front. In other words, it is like looking at a double edged dagger from the front. I leave about 3/4" of shaft, and thin it down from a 1/4" or larger, to about an 1/8, or 3/16". That way the shaft can but up against the arrowhead, and you can taper the shaft down to it, so there is less resistance on penetration. If I knew how to post pictures I would post a picture of one I have left. Or I could send it to you. If you want me to send it to you drop me an e-mail.
Curly494@bellsouth.net . Like they said if you are just going to use them for targets, round the shoulders, or angle the shoulders out from the tang. you could make a leaf pattern blade, or flatten them out by sanding, or filing, or grinding, and glue two or mor slabs together, and file them, or grind them down to a semi round shape, then put them in a drill bit, and with 80 grit sand paper, or a file, turn them down to a dowel shape, and shape a feild point on it. Lot of work, but beef bone takes a nice shine, and some bones have character shading, and coloring in them. I used to make jewelry out of them. They make nice knife handles, and pistol grips, inlays,and pendants, and such.