That would be correct GM54-120. 72.5 grains of H4198. Getting no pressure signs at all. I did try out the 3031 but it just wasn't as accurate and, like you said, was using way more powder to achieve the same velocities.
Salar600, even with this being a Nosler BT I am just a little worried it won't open well at longer ranges. 200 yards and in I am not a bit worried. Out to 300-350 it is starting to shed speed pretty quickly. I'll just limit myself to 300. 1700+fps it should open well. Now I just hope the weather isn't screwing with the migration like it has the past few years.