100% is simply not possible. There are too many variables in field shooting that are outside our control: a gust of wind at the last second, a cramp just as you are breaking the trigger, a squib load, a scope that had its zero shift unexpectedly, etc. Having said that, I want to make sure that all variables within my control are controlled and I have a 95% chance of success.
Good assessment, Never really thought about what could happen with the things that are outside your control. That being said.
My thoughts are, if you don't have the shot needed to cleanly kill your target, don't pull the trigger.
