I hit the elk one the lungs with a 250 gr sst, one shot kill. He ran 40 yards before his subscription was cancelled. I shot my moose at 18 yards with the 250 gr, and dropped him on the spot. My whitetail was at 104 yards, one shot, dropped on the spot.
I would have to say that the hornady sst has been quite a successful bullet for me, I use them, 250 gr, with 3 triple seven pellets in front. It kicks like a mule but sure does a nice clean kill.
Last year I shot an elk in the neck at 37 yards with the sst and absolutly destroyed the bullet, all I found when I butchered it was fragements.
They are definitly worth trying.