And the deer target is at right angle to the shooter, that isn't always the case in the field, like wise a leg might be back?
Of course deer don't always stand broadside on, but we are talking about the target used for the DSC1 shooting test, which is at a simulated target that is broadside on.
This is a blatant digression and I’m not trying to teach Granny to suck eggs but this shot placement is outdated and suboptimal, it will as you say result in a dead deer and might save a small amount of the triceps muscle BUT it places the bullet perilously close to the apex of the diaphragm which in turn is far more likely to result in a carcass contaminated with rumen contents.
It is hardly a blatant digression - if you actually look at the DSC1 roe target, and where the chest killing zone is, I can't think of better instructions to give to a Candidate to ensure they get all shots in the zone?
Inserts for Roe Target A4 Head and Body DMQ approved -
Two inserts for Roe Target A4 Head and Body DMQ approved1 x Size A4 297 x 210mm replacement – BODY1 x Size A4 297 x 210mm replacement – HEAD
The reality is that the chest killing zone hasn't moved - what has changed is that the old DSC1 target gave you an aiming point that only exists on deer seen in Gary Larson's Far Side cartoons:
