They are designed for straight line penetration, the Raptor (hollow point) is designed to penetrate a couple of inches before the petals, 6 of them, spin off in 6 different directions inside. The shank keeps on a straight line and usually exits. The petals do an amazing amount of damage inside the animal.
Using my .500 MDM in Australia last year, I took 3 Water buffalo. All the shanks exited and the insides of them was close to mush. Took a Giraffe in '17 with my .458 Lott and a 420 gr Raptor. It was a quartering too me shot and at the shot, the Giraffe rose up on his rear legs far enough that we thought he was going over backwards. He recovered and went maybe 20 yards before collapsing.
The .500 MDM puts that 420 gr out at 2430 fps.