Newboarhunter:

The 140 gr. Nosler Partition lost most (85 to 90 Percent) of its lead front cavity, and did not have enough weight to penetrate to the vitals. The loss of a Nosler Partition's front cavity's lead, or most/some of its front cavity's lead is not uncommon. If my friend would of used a Remington 160 gr. Nosler Partition, I think the bullet would of retained enough mass to reach the vitals. Good luck