The bullet mushroomed back perfectly. In fact for hitting the spine I was surprised that it held together. It weighed 61.3 gr after I cleaned it up. He hit her from above and drove the bullet down into her length wise. I would say the bullet had close to 24" of penetration. She was facing him with her front feet kind of lower than her back. The bullet hit the spine above and between the shoulders. It angled down and back taking out the lungs and liver stopping at the diaphragm but it stayed in the liver just under the (skin) of the liver, you know that see through tough stuff. Any way I was happy to see her drop so fast. Ron