Andrea;
congratulations, on finding P.A. . Sounds like you are on your way to making a bow. That was a trememdous offer that 330 bull made you. Take him up on it. Especially with the preforms. Go aghead and make a few bows, and then start looking around for local wood. You might try Cotton Wood, or Maple. I don't know how much Maple you have in Bozeman, but you should have plenty of Cotton Wood. As for points try using beef bone. Pork bones, are too brittle. Some people like to use rib bones, but I like to use leg bones. Try the pet store. Or Elk, Deer, and Antelope too. Since you have a dremel, you can polish them up really nice. They take a really nice polish, with a nice sheen. I use a jewelers saw, but you can use a coping saw. If you have access to a grinder, that helps too. Lots of bone dust. If you have bones that are dark, or stained, just soak them in Hydrogen Peroxide, for a day or so. Draw the style point you want on the bone, with a pencil, and then cut it out. Then use a mill file to put the bevels on the edges, and to thin it down some. I like to leave about a 3/4 inch or so stem at the back, and I thin it down about 1/8 of an inch or so, and leave about 1/16 of an inch on each side of the back of the head for the shaft to butt up against. Then you can taper the shaft down to size to make a smooth profile so there is less resistance on entering the target. I use a triangular shape, and make it diamond shape in cross section. I make the thickness of the back of the head about a little over 1/4 inch, and taper it down towards the point.
I hope this helps. If you would like, I will make you one, and send it to you so you can see what I am talking about. I would send you a picture, but I am not the most computer literate person. So my ability to send you a picture, is rather limited.
If you want one send me an e-mail with a po box, or wherever you want me to send it. My e-mail is curly494@bellsouth,net
be sure to reference the bone arrowhead, so I don't delete the e-mail. Good luck, and enjoy.
Stickbender