I believe BigStick has some experience with that combo, could look it up, or maybe he`ll chime in.
I was going to try the same in my 7x57, 9 twist, but the 162 ELDM shoots so darned good that I`ll stay with it. High BC and more velocity than I could get from the 180, gives it a slight advantage to 1k yrds. YMMV.
