What is your intended purpose between the 165 and the 180? I use 165 Gamekings in my 30-06 as well , it's a great bullet and can pretty much do anything a 180 partition can do. Can Center punch elk shoulder and have the Gamekings lodged up under the opposite hide. 46.5 gr is a really light load probably only 2550 fps or so. You could start there and work your way up over 50 to maybe 52 or so depending on pressure signs, get maybe 2850 or so out of it.