They're accurate as heck in my .308 Encore, but performance on game was less than desireable. I shot two feral goats last year with the 150 grain versions. Although both had good shot placement, neither animal went down as rapidly or as cleanly as I would have liked. They basically acted like big V-maxes: minimal penetration with maximum expansion.
My experience seems to be unusual though, everything else I've heard/read has been favorable when used on lighter game.
I still shoot them, but only at jackrabbits to keep me tuned up with the handgun. My Encore likes 150 Silver BTs even better, so I'll be giving them a try this spring.