Post mortem.... I guess I'll start with specs. Thats a brown bear 175 with a 75 gr steel insert. The shaft is a GT 35-55. Total arrow weight is 540 ish. The bow is a 52# at 28 and I draw 28. The bow is a 58 inch recurve. I switched this year away from my 64 in long bow. WOW, is it easier to manuever inside the blind.
That same broadhead has zipped through two antelope now. The modifications are nothing major. I think the two weak points on that broadhead are the thin tip and the ferrule blade junction. I grind a flat bevel on the leading edge of the ferrule and file back the tip to slightly thicker steel. The ferrule adjustment is conjecture, however the tip is from seeing a couple curl ON impact with bone. I hope that helps.
As for post mortem, I shot that goat at 18 yards and he ran 50. I have learned to let them drink before I shoot. It seeems to relax them. However,this guy drank and started to leave immediately. I drew, stopped him and hit him quartering away taking out liver and opposite lung. Thankfully, he bled profusely and didn't make it far.
PS. YOU CAN SEE HIS RUMP ABOVE AND TO THE RIGHT OF THE BLIND, IN THE WATERHOLE PICTURE.