To be 100 percent honest, I truly don't really care what Hornady calls or labels there 500 gr FP bullet. I've held the loaded round and component bullet in my hand...they are identical twins. Either way, I think that they are using sheer weight and mass to try to make the bullet function properly. I have been unable to get the bullet to blow apart or fall apart at single shot pistol velocities. I do wish that it was bonded though...I need to order some 450 gr Spitzers (bonded) .500 from Fury Bullets to test...the 300 gr RN (bonded) 44 cals that I've tested in my Super Redhawk are pretty dang stout (I love em)