As you watch the image above the marked centerline of the skeletal deer, see how everything on that line (and forward of it) is vital.
Using this line, we have a huge margin for error on the forward section.
However, this leaves us with 0 margin for error on the other side of that center line.
Now it is a matter of deciding what error we can and cant live with
Personally, I cannot live with visible error
What I mean by visible error is a living breathing error that walks among us days,weeks and months after the error.....in sight of neighbors and camera's
That error which I am referring to is the error embedded through major bone.
Minimal penetration is 10" on a shoulder of a mature deer.
There is (estimated) 4" of flesh, 1/2" bone, 2" flesh (offside same leg) and then 1 1/2" of hide and rib cage.....and thats just to poke through into the chest cavity
Give another 2" to cut certain into the one lung that is in that chest cavity.
8" means a very real potential of carrying that arrow until either infection takes that deer or it simply over comes it's new appendage and starts posing for the local news crew
SO....for myself, I will opt the centerline with an expandable.
Just because I do that, does not mean that I am suggesting that others follow suite
Gut shooting a deer (for some) can mean loses based solely on environment or self.
Witness last year when I gut shot a lamb in Westchester.
We left that lamb to die and headed back a few hours later to collect it....only to find that the Yotes had beaten us to it
Another concern is other hunters, ect. who will haul that deer away from you if they get to it first
No.....my way is not the best way for everyone
Choosing the center point that rests between the turn centerline and the scapula is likely more acceptable for most.
In this instance I would caution the size (diameter) of the expandable that you might use and even suggest the consideration of a fixed head of modest size.