I have hunted with the 250 gr SST for two seasons here in PA. We have a generous antlerless license allocation in the Special Regulations area where I hunt. I have taken seven shots at deer in those two seasons and all seven deer have fallen quickly with one shot using 85 gr FFFg T7 and the 250 gr SST. These shots ranged from 10 yards to about 100 yards. None of the deer went far and none of them required a second shot. They were all double lung shots with several hitting ribs. Before that, I used the 250 gr XTP. I have not experienced any bullet failures with the SST or XTP. I suspect my experince is pretty typical. One question I have is, are the alledged failed bullets being used in their correct FPS range?