I just love it when poeple talk about bullet "failure" because they recovered a bullet that they feel didn't do the job, but they recover the bullet from a dead animal!
A friend of mine uses his target rifle for hunting every year, he uses his match ammunition to hunt with. I have asked him, why don't you use a hunting bullet, and he tells me "It's all about shot placement", he has never lost an animal to this day, he hunts hogs, whitetail, pronghorn, and mule deer.
Don't get me wrong now, I understand that you "wish" the bullet had expanded and dropped the animal in it's tracks, or at least made more damage, but dead is dead.
I myself have shot whitetail deer with 140 TSX out of my 7mm-08 between 100-150 yards, all lung shots, and they either drop right there or they run about 20 yards and collapse. I also shot a mule deer at 365 yards with a 168 TTSX out of my 300 win mag with excellent results.
My dad hunts deer with a .223 using 53 gr. TSX bullets, he has never lost a deer either, but I have seen many poeple at the deer lease lose deer, and they use 300 WSM
's and 30-378 Weatherby's! Was it bullet failure, or poor shot placement? I bet if I asked them they would say it was bullet failure!
Now, I'm not accusing anyone of poor shot placement, all I'm saying is that some people will blame the bullet performance and many other things before they blame themselves.
On the other hand, I don't think it matters which bullet you hunt with, at some point you will shoot one that you feel didn't do it's job, none of them have a 100% performance record!