Elky, Federal is loading Nosler Solid Base bullets in several calibers this year. I have been shooting 150 grain SB's in my .308 for a few years now and have been extemely pleased with the accuracy but have had questionable bullet performance on a blackbuck and a whitetail doe. On all the other animals that I have taken with this bullet, performance was perfect. John Barsness has told me that they are a pretty tough bullet and need to be driven fairly fast for best results. By the way, I got a big stash of them from a friend that used to shoot them through a .300 Weatherby. RS