RE: Killing distance
Hunting and target pracice present different risk, a lost or broken arrow vs a wounded animal, there is no comparison. kwowing your own limitations comes from practice at various distances and also under a variaty of conditions. You not anyone else has to be confident you can make the shot at that moment under whatever circumstances are presented, and the only one thats going to know whether it was right at the time is you. I have been haunted by making a bad shot and wounding an animal and I've still not forgotten it. someone said it earlier "listen to your gut instinct".
Happy shooting
Jim