I fooled around with bone points quite a bit, once upon a time. Stone projectile points never made sense to me? At some point in my youth I ran across a book of native stories, I think maybe written by a guy who ended up serving on the montana senate long ago, or maybe it was wyoming? Way back when. Anyway there was a mention of some nation, maybe crow or blackfeet I think, with "bison bone lance heads polished like ivory."
About 25 or 30 years ago I read an archaeology article about bone chards found around a prehistoric firepit. It described ancient people breaking legbones to get at the marrow inside, so I gave it a go. I just picked up some beef stew bones (probably 4 or 5 inches long), parboiled them just enough to gel the marrow inside, then split them with a hatchet. Hand sanded the best chards with 60 grit, & worked my way down to probably 800 grit. Maybe higher? can't remember? They sharpend up QUITE nicely, and I soon learned to haft them BEFORE sanding the final cutting edges. At the end of the experiment I pounded one through a piece of 3/4 inch plywood with a steel hammer (back when 3/4 meant 3/4). Yanked it out the other side with a pair of locking pliers. Point was totally unscathed and perfectly ready to tip THE finest arrow ever built by man.
I assume deer or elk bone would be a lot tougher, but probably depends on nutrition? In any case, can't go wrong with bone IMO.