The 165 gr Barnes bullet is in every way superior to a 220 gr load in 30-06. Superior ballistics, penetration, and terminal performance. The late Greg Rodriguez wrote an article on the subject
this isn't ging to be used for animals with thin hides and small bone structures. this is for AFRICAN GAME, thick hides, thicker muscle tissue and heavy bone wreaks havoc on lighter bullets traveling at high speeds. a heavy round nose traveling slower is better because even though it's slower and doesn't expand as much it takes more to stop it.