I just tested some speer 150 spbt's over 52.5 grains of Imr 4064 and got 2890 fps on a 95' day, and 4 of 5 went into 1/2" at 200 yards. Not the fastest round but it's the best group I've ever shot in my '06 at this range. The fifth bullet opened the group up to about 1.25" and there was a little wind. I think the speer 150 boat tail is going to be my new favorite 150gr. bullet. But just about everything shoots well out of my 10 year old Abolt II.