Originally Posted by zrexpilot

You have it right, its the hole you put in the animal. 2500ft/lb of energy slipped between the spine and and the lungs will not kill a deer. He will live another day. 600lb of energy through the lungs will let the air out and the life of a deer.
A .22 lr with 100 or so ft/lb of energy to the heart of a deer will kill it everytime. Just so you know a .22lr out penetrates a .223 or so I've read

ps how you liking that .243