If you shoot them into something solid, they will flatten. This was shot into poplar wood. I have to agree with Sabotloader.. if they hit water, seeing the nose roll over did not surprise me at all. But I would bet if they hit say a shoulder blade or heavy bone structure, they would flatten just fine.

Also the No Excuse 460 and the Bull Shop both weigh 460 grains. I wonder if the ones in this test might not have been pure lead.