The load I am using now for the 270 Sherman is 66g of RL22 with a 130g Berger VLD. I haven't chronographed this load but it is over 3150fps in a 22" barrel. That's around 3300fps in a 26" barrel. I have shot the 165 Matrix at 2950fps in the 22" barrel so far.
For reference the Book max from Alliant for the 270 WSM is 66g of RL22 with a 130g bullet and 3228fps in a 24" barrel. For a 150g max listed is 64g at 3050fps in a 24" barrel.
I have 2 270WSM's and the performance of the Sherman is very similar.