This has all been very entertaining and yet enlightening. How bout some gas for the fire. Per the OP's description of his two kills, the bullet's lead core exited and left the jacket in the animal. The animals only required the one shot to dispatch, and in the case of the heart shot one, it left a sizeable exit wound. I don't personally think the bullet failed as long as it exited the animal with a majority of it's lead core intact. I wouldn't recommend the 240gr for 300+ pound hogs, but wouldn't hesitate to use one if the opportunity arose while deer hunting.
I guess it depends on the shooter's expectation of the bullet. If a cup & core bullet sheds it's jacket every once in awhile on the game I shoot due to bone, extreme angles, or noticeably larger specimen.........I don't lose sleep over it. As long as the animal dies cleanly.........it performed as expected for a cup & core.
If a bonded bullet or partitioned bullet sheds it's core........I don't think it was supposed to do that. We probably have a problem.
Cup and core............there is always the chance. If you don't want or can't afford that chance........get a stronger bullet.
