I have seen many bears taken bye use of JHP's using revolvers, in saying this, I have also seen many bears with very big exit wounds as well with great blood loss before the bears expired, I have also seen hardcast perform well, due to its penetrating capabilities,but of course no change in dia, like you get from JHP's...Bottom line it all shot placement using a 44mag, When selecting a bullet, Its all preference when hunting Black bears, Bullets of today times are well constructed and can handle any task you give them as long as the bullet was designed for large game hunting, Now if I were to hunt brown bear,Griz, Something I consider really big game animals, with cavity three to five feet deep, you know Id either be using something big heavy 350gr plus, Hornady Interlock FP jacketed bullet or a well constructed cast bullet for deep penetration and a good exit wound. When it comes to hitting solid bone, remember in most situations the bullet will take the path of least resistance for the most part, no matter what your using for a bullet, just the nature of bullets in general, yes sometimes the cast will bust the shoulder and drive deep, when you bust that shoulder the animal is not going anywhere fast, I have also seen jacketed bullets do the same with out separation. Personally I'm a meat hunter and prefer the shot in the boiler room,little meat waisted, yes the bears might run a little but not far with out any lungs;) Aim small hit small RAMbo.