I would agree with the 95% figure but it also depends on how you define "fail." Some would say if you recover the animal the bullet by definition didn't fail. But, if you shoot multiple times and recover a bullet that blew up before making it to the vitals, that would count.
I know a guy who shot a nice bull with a 168 TTSX at 60 yards. He showed me the recovered bullet because I loaded the ammo. for him. It centered the heart. Good thing it did, because it looked like you could stick a new plastic tip on and load it again.
By definition, it didn't fail, but it sure did make me second guess using that bullet at those velocities. 308 Win. in this case but a .300 Weatherby at 350 yards is the same thing.
