Besides the shooter, bullet construction is probabley the most important part of a hunting round.
Betcha a deer couldn't tell it he was hit in the heart lung area up to 300 years (normal hunting ranges) with a 150 grn 7.62X54R or a 150 grn '06. Chance are both are going to exit the animal. Same quality bullet you'll get the same damage.
Hyper velocity is not needed. Look at the 30-30, look at the 30-40 Krag, both excellent hunting rounds, both have less velocity then the two rounds mentioned.
What it really comes down to isnt the bullet, but the shooter's ability to put the bullet where its suppose to go.
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071