Hey, I'm all for personal observation, I can't argue that they don't break bones, and they do fly well so hitting shoulder blades shouldn't be a problem. Seven years ina Physics department, and seeing the poortarget penetration, led me to believe that the steep blade angle would have greater friction, ultimately leading to less penetration. Physics don't lie.....everything about archery pertains to it in some way....mass, velocity, kineitic energy......(> friction = less penetration.....no matter what the cause). Just going back to the basics.