I killed a good MN buck at 60 yards with a Python back in 94' with a then pretty new Hornady XTP. A little high in the ribs and 3 inches posterior of the heart. It took him about 200 yards to fill up and start leaking and 300 yards total to done squirting and dead. It was my biggest MN buck at the time at nearly 300lbs on the hoof. Expansion was ok, but zero shock. Had I not been in the open farmland with a bit of snow I mave struggled to find this one. It was the beginning and end of my straight-wall pistol hunting days.