I've loaded 120g Speer Hotcores 6.5x55 and 165g for 30-06. I have also loaded 130g Sierra GK for a 270 Win and 100g GK for a 257 Roberts. In my experience the Speers seem tougher and the GK are to soft until the range get well beyond 200 yards. My best results have been 300+ yards with the 130s. I have had good expansion and full penetration then. The Sierra's have been more consistently accurate although the Speers were pretty good too.
