OP: What type of cases were you using? They seem to be running real hot and I'd imaging that your case is full of powder: compressed load?
I just loaded some test rounds with 147 FMJ in IVI cases, staring at 40grs moving up in 1/2 grain increments to a max of 43gr, almost fills the case: maybe 1/4" from the top.
Looking forward to seeing other results using this powder.