I d say yes 5 deer one season 4 over 500 ,1 at 470 mine,shot placement is the key it is called hunting not wounding .Not sure about elephants rhinos Or hippos but North American species yes.
140 hybrids(6.5) have gotten a bad rap for pin holing, it seems that with the thicker target jacket you have to have a larger met plat to ensure expansion. I have personally taken several species with a 180 (7mm) hybrid out of my 7mm Dakota and have found it to be an excellent killer on everything up to and including elk