If Win or Rem brass weight them carefully break them in to groups by weight and H2O capacity, I started with Rem brass when I got my Lee Kit and I had 7 groups formed from 100, while you at it anneal and turn them. Bullets I would still be concerned about your twist rate, I would assume its either 1:10 or 1:12, to start try 168 gr SMK or Nosler Custom Competition, sort bullets by their length and ojive, messure your max seating OAL, meplat trimmer would be nice to have... load your powder -1 grain bellow the max seat your bullets 0.015" of the lands 3 -5 loads is adequate for testing , then decrement another 0.015", I usually start with 4 different loads try them, see what shoots best then adjust your load by 0.05" till you find your sweet spot. Then increase 0.5 gr of powder or decrease it you might have a shooter. gun)