Here is my take on accuracy... or more correctly hunting accuracy after having lost two animals in my life, one with my bow, one with my muzzleloader , and having the good fortune to have been able to track to conclusion several others.
I'm not a big killer by any means, but I've come recently to resort to a particular methodology that has not lost me an animal in now probably 10 years. Rule #1... Pass up shots that are not 100% (and no shot is 100%... but you know what I mean...). This I've done and therefore I've had many more animals in front of me than I've loosed the string on.
Rule #2. Feel good about the shot. I can't quantify this for you, it's subjective... but again, I think you all know what I mean.
Rule #3. Practice, practice, practice, and like real estate, location, location, location.
I practice into basically coffee cans with blunts, from 5 yards to 22 yards (my shooting range currently till I can clear more bushes out...) and I rove incessently while I'm hunting.
Effective range is something I personally think is something you feel comfortable with. Pie plates are great, easy to see but can also give you a false sense of accomplishment. Regardless of what you use, 100% should be the goal in my opinion.
Aloha... :cool: