I have a Kirby Allen build--XP in 6.5X47 Lapua. With 123 SMK I am getting 2740 fps.
With the 120 BT it is 2763. This is with RL 15 and CCI-450.
I am really impressed with this round so far. Haven't taken any game yet but it is extremely accurate. Should make a dynamite antelope/deer cartridge.