Can't help with a 150.
With a 168 about 39 or 39.5 grains of 3031 in LC brass is really good.
Come on mathman, you have some tried and true 150gr loads that would work. I know you are a 308 lover and have tried a few 150gr loads. Hell, i hate the 308 and could come up with some tried and proven loads for the 308 rifles ive owned in the past. Use Varget, RL15, 4064 etc. Somewhere in the 45gr ballpark for any of those powders.