Hi mate i completely understand where you are coming from.
I have been shooting at my permission for a couple of months now and can consistently hit 1" targets at multiple ranges.
I mentioned earlier that when we waited fot the rabbits we did not shoot as i wasnt 100% about the kill zone and distance
But today we have been out and measured the distance of there normal spots.
I have humanely shot squirrels, crows etc. As i knew a head shot would take them down in one, but rabbits have a larger head so i wanted to know where the brain was.
Thanks for looking out though