Per Nosler, they have a max load of 82 grains of H1000 for the 150gr ALR. I know that these are recomendations, but still good to look at. Let your rifle tell you what it likes, from pressure signs, accuracy, brass life, things like that.
The RL 25 was over 3300 fps in their barrel.
The barrel used in their testing is a 24", so a 26" or 28" might have some more speed.
I have not used the 150gl ALR yet, but want to as my one STW shoots other 150gr loads really well.
Here is the latest data from Nosler. This will give you an idea where to start or head to get to what you want.
I have all the Nosler data #7 Reload Manual and of course the online stuff as well.
Sounds like RL25 works pretty good for velocity.
I just took a tour of Nosler February 6, 2015. I have had nothing but great luck with Ballistic Tips, AccuBonds and Partitions.