I load SST's for my daughter's .308. She has taken four whitetails at ranges from 20-150ish yds. with complete penetration on broadside shots. She can't handle full power .308 loads so I make up her ammo at 300 Savage (2600 fps) velocities. In her rifle they are more accurate than the Interlocks.
That's why I maintain they are better at a longish range. I've only used them within 50 yards or so. I went back to a heavier, slower bullet that does less damage.
The SSTs are accurate, but simply too destructive for the hunting I do.