The weatherby will do very well with the 131. Get an 8 twist barrel, 26-28" long and you should be in the neighborhood of 3300-3400fps. Even if you don't maximize and run it hard, 3300 is pretty doable from all reports that I've seen. Think of it this way, I run that bullet in a 26" 25-06 and with 59.5gr IMR8133 I get just north of 3200fps, pushed hard. With the extra case capacity of the WBY, you'll be hitting good numbers easily.