Apparently those LeveRevolution style bullets (FTX) are no good for weight retention and certainly do not stay together upon impact. I experienced the exact same results (seperation of jacket and core) as this guy using the 200gr FTX bullets.
I work at Cabela's and have heard that about the FTX bullet at least 5 if not 10 times. The FTX just doesn't do it for weight retention.