This is thanks to Dr. Ashby and Feb 2009 TRADITIONAL BOWHUNTER.
"The Tanto Tip Advantage" article studied 42 Tusker Concords so it's even your bh in question.
Tanto,round,chisel,arch,concave,needle,and flat tips were studied with the tanto besting all performance testing with the least damage of all tip profiles.
AVOID: "The tip should not be single-beveled on the same side as the main blade's edge bevel.Doing so increases the tendency for the bh to skid off the bone..."
DESIGN: "I've been using about a 30 degree angle of attack,or tip slope. That means the total angle at the tanto's tip is 60 degrees".
Dr.Ashby states more designs need to be tested.
Hope this helps and check out the full article.