Re: winchester supreme ballistic silvertip .308
It is what I have used for big pigs and whitetails for the last 5 years or so. The 168gr tracks my 175 BH loads to 400yds very well. It is 3/4 MOA out of my GAP which is all I can ask of a hunting round. I have also found it to shoot very well from a Steyr SSG and AI. I have only seen one gun that didnt like it. Its performance is very good- knocks the piss out of whitetail. They drop DRFT. I wouldnt use it on thick skinned, tough animals or for bad shots, though, as I have found its expansion to be fairly rapid and almost explosive.
The 155 (or 150gr) stuff is the first ammo of any kind that my GAP didnt like, though. It shot like crap- 2MOA or so. I avoid that loading.