About 7 years ago I conducted some penetration and expansion tests of varies bullets in self defense calibers. The 230 grain XTP in 45 ACP +P did fragment, but also significantly out penetrated the 230 Gold Dolt.
Fast forward to today the XTP from the 45 Super at over 150 FPS faster doesn't fragment
The 300 grain XTP that Lynne Thompson used in Austraila didn't fragment according to the outfitter. The bullet broke bone expanded a bit, but not overly and penetrated well.
As with all brands of bullets they evolve over time.