All I can say is "read ALL of Dr Ashby's reports". And, listen to what every one else advises,and make your decisions based on your own shooting tests. For me, with almost 40 years of experience bow hunting, there was a LOT to learn from Ashby. Choose what you want to take away from all of it.
I agree with many that it doesn't take much to kill a deer at close range with a good shot. For me, it's all the gray area that's caused the questions. When it comes to bow hunting, there are lot of gray areas.(talking about unexpected events, not ethics!)