I’ve been working up hunting loads for my Bergara Highlander 300 PRC for about year now. It’s is a 1/9 twist, best results to date are with N560, Berger 210 VLD Hunter, and Winmag primers. Using the satterlee ladder method I have played with Nosler 180 and 200gr, Hornady 212, and the Berger 210. For powders H1000, H4831, and N560. My son harvested his first Elk this fall with it, one shot dropped in its tracks, granted it was a 125 yard chip shot.
I have some Hammer Hunter 199’s on the way to play with next. happy to share load data and range results with anyone who wants it.