I also got to do some testing with some H 4831 SC like you suggested.
Same Barnes bullets loaded .050 off the lands just like before.
Did my testing at 300yds and best group was 90grs. I had some loaded with more powder than that but it was getting hotter and the mirage was making the orange dots dance. I didn't bring the chrono with me this time but I have loaded up some more for further testing and will clock them then.
I was really smiling after I shot this group.