For a long time, my goal was to make all my own archery tackle and take a deer with it. Points were my weakness. I tried knapping glass and vitreous china from broken toilets (we call it "Johnstone" or "Commodium" ) but never got a single decent point.
There's nothing quite like taking a deer with a selfbow and arrows you've made. And I imagine that taking it with a point I've made will be even sweeter.
Knapping takes some practice, that's for sure. Try using tempered plate glass or even the thick bottoms of bottles, you can get some nice points from them and glass can be easier than stone when you're first starting out.
I'm going to be doing some knapping later this month -- mostly obsidian (hey, I'm a Californian, it's what we have!) but also some Texas chert and dactite.
I figure I'll end up with more points than I'll need, so if you want, I'll drop three or four in the mail to you so we can compare notes when deer season rolls around.
PM me if you're interested.
(Sorry for veering off course on the thread... now back to firearms, let me sing the praises of a fine hand made .50 blackpowder rifle when it comes to deer....
Next to archery, it's the most emotionally satisfying experience to me. You shoot, can't see anything from the smoke and when it clears, hopefully the game is already down...)