As others here have correctly stated seating the Raptors properly is important to achieve proper neck tension.
The pic provided above shows a correctly seated Raptor.
Crimped above the second top band.
During the evolution and design of the Raptors I was in a position to be the outfitter in Australia where the two main individuals responsible for the design of the bullet came to do a lot of the field testing and experimenting.
Over the course of several extended herd management/cull hunts we took in excess of 100 buffalo and an assortment of other game including feral cattle and wild boar with numerous different calibers and cartridges.
The CEB Safari Raptor is, by some margin, the most effective, reliable and consistently performing thick skinned projectile I have seen and used on buffalo sized game.
Entry holes are "cut clean" and remain open, kind of like cut with a leather punch, provided an egress point for a blood trail (if that is required).
Impact is dramatic as the blades shear departing from the main base in a centrifical pattern destroying tissue away from the main projectile base and drawing more blood flow to the exit/entry holes.
Penetration is at least as good if not better than any other projectile I have ever seen and STRAIGHT every time.
Personally, I have taken in excess of three dozen bovines, buffalo and feral cattle as well as feral hogs and numbers of feral horses, with both .50 cal and .510 cal Safari Raptors and would never consider hunting either with anything else. Period.
Others mileage may vary.
Contact CEB for loading data, they are very helpful people.