James, I am shooting a full length FMJ 400 spine, Zwickey Eskimo 125 with an insert. Out of my 62" Pronghorn that is 62@30". If I remember right (all my gear is still in WY)(returning in am). My total arrow weight is just under 600g and I am shooting @ 190 fps. The arrow sailed through the ribs with no problem. But, it didn't have a chance of making it throught the scapula. I was shooting a 770g arrow last year with an Abowyer broadhead. I would like to try that on a scapula but, I would be surprized if even that would penetrate the scapula. That is a tough bone surrounded by some tough, thick tissue.