Daryl Hrdlicka published a research paper on the hitting power of an Atlatl Dart in Oct. 2004. The darts I throw weigh in at just under 6 oz, with a speed average of 90mph. With the Kinetic formula 1/2xMassxVelocity^2, my kinetic energy is in the neighborhood of 60ft lbs. My longbow shooting a 500gr arrow at 165fps has a kinetic energy of 58ft lbs. Anyone who wishes to read the document, the site is
www.thudscave.com. Proving without a doubt that Atlatl hunting is atleast equal to primitive archery.