**Not sure why it quoted you and won't let me get rid of it***
I personally have never selected a caliber or broadhead when hunting to give me the best chance to kill an animal with a poor shot. I plan to take only ethical shots knowing my weapons ability and that of my own. I choose the most accurate weapon I have available that's suitable for the job. Yes, poor shot placement happens but its not something I use a large weapon than needed to make up for. Unfortunately, some hunters do and make lower percentage shots on game thinking their magnum or big bore weapon will make up for shot choice, they quickly no longer become a hunting buddy of mine. In my opinion a bigger hole never makes up for shot placement.
I dislike the statement people make that if you can hit a paper plate with the weapon of your choice you are good enough to hunt deer. Lets see that's saying you can have a 9" margin of error or 9" shot group at say 25-50 yards and that's "good enough" no wayyyy. I wouldn't let my son hunt until he could hit a clay pigeon on backstop 4 out of 5 times and that became the max distance I'd allow him to shoot at a deer. I have personally only lost one deer the past 10 years and that was with a recurve bow that hit the shoulder. The same buck was taken 2 weeks later with same bow.