One thing I would like to point out is the difference between Ungulate anatomy and Carnivore anatomy. Whoever did these pictures for NBEF didn’t understand this difference. The thoracic limbs (front legs) are further forward in regards the to placement of organs within the cavity and the thoracic skeleton as well.
The distance between the humorus and the ribcage runs about 4-5.5″ on mature black bears and 7-9 on a mature interior griz. Attempting to shoot up tight to the shoulder like you do on deer can cause you to miss the vitals altogether, passing through between the ribcage and leg. The majority of those shot and lost here in AK over baits are shot just like this.
The point of center for the heart averages roughly 7-8cm behinde the shoulder line of a standing broadside bear, so on bears you need to back off the shoulder a bit to “center punch” the vitals. There is a misconception that bears don’t bleed very well. Bear hair does not shed blood or water very well but if you do hit them well you will still have a good blood trail.