According to Hodgdon you can reduce the load to 60% of max for any bullet where H4895 is listed as appropriate. Their online manual lists 46.7gr H4895 with a 175 Sierra as max load. This would translate to a reduced starting load of about 28 gr of H4895. I think this would translate to about 1700-1800 fps. I bet about 30 to 32gr of H4895 with a 170 gr FP would be about right. See if you can get someone to chronograph your loads. Good idea to load down, effective and minimal recoil. Good luck with your loads.
