I have shot two Whitetails and one Black Bear with the 350 Hornady in my 458 WM at over 2500 fps and have never seen this bullet fragment, Just a two inch exit. All rib shots. This bullet seems to hold up very well for me at the higher Velocity.The Kid said:Those bullets are fine for black bear as others have said they usually die pretty easy. I do find it funny that Hornady rates them for 2900fps in the 460Wby. I used to shoot them in my 458Win at 2500fps, shot one into a 210lb blacktail on Kodiak island a couple years back, bullet fragments everywhere, on a broadside rib shot. I have switched to the 350gr Speer Magtip for that rifle, but I just laugh at the idea of pushing the Hornady to 2900fps and getting any penetration, methinks the "Interlock" feature may be a bit overplayed.