I will be direct in my response and I am trying to be helpful but sugar coating accuracy stuff just does not answer your questions properly,
assumptions, 1. new to longer range shooting, 2. buy a savage instead of a $5000 gun (no problem just reality for an answer) 3. 2015 join date so you are new to this, 4. not sure how much shooting or reloading you have done 5. no idea the longest distance you WILL SHOOT AT A LOT
so
stick with 155.5 BERGERS or lapua 155 for now and shoot a lot, less recoil and yet quite accurate out to 600 (perhaps 1000 in calmish winds and or good conditions)
I take it you are not competing in national f-class events right away so learn the wind and gun
this will place you in a better position to handle the 185 juggs bergers or lapua heavies later on next year,
try not to be too big man at the start
great targets and good gun handling are learned not aqcuired by buying the biggest and badest out there,
my thoughts and welcome
Jefferson