Get in touch with scenarshooter here at the Campfire.
Pat has killed a bunch of big critters with the 155 scenar and can give you all the good info.
I'm hoping Pat chimes in with some good pics and data like he usually does. It really seems to get the job done for him. I've actually been interested in the combo too. I was going to give up on the 308 win a while back but after getting a new rifle today, maybe I'll change my mind.....