Eddie, sorry if I'm too cryptic on my reply. All I was trying to say is that if someone asks me what is "best" when it comes to stone points, I'm not going to tell him that: "If it kills the thing you're shooting at, it's good." I'm going to tell him that stone points are most effective if they are light in weight and the extra mass that you might need at the tip of the arrow should come from the foreshaft or extra wood at the tip. This "extra" wood might mean putting the fat end of a natural shoot forward or making the arrow longer, for example.
Steve, input from Ralph would be cool. He seems to be in the same boat with Eddie. "If it kills, it's good." I wonder if he has a favorite arrow and what the specs are.
Aaron, I've bareshafted arrows with arrowheads as small as 10 grains from a 50# bow. And I've bareshafted arrows with no points (just sharpened wood) that were intended to be used only for target practice. And I've bareshafted arrows with 100 grain stone arrowheads. Yes, all the different components work together and many different factors contribute to good flight. But the process does not have to be complex.
For me, it's all a matter of creating a shaft from heavy wood with a weak spine. There's always a few of those for every 20 shafts (or so) when gathering the materials together. And when I begin the process of bareshafting and tuning the arrows, I usually leave the arrow a little long and sharpen the wood tip slightly. I don't put the stone in place until the AFTER the arrows are tuned. I will cut back on the tip or sand down the diameter (or whatever I need) to get the final weight to match the "tuned" weight. Not only does this avoid the problem of "What target do I use for stone points?" but it also makes the process seem more true to historical methods.