If you don't have reloading components I would buy Hornady 140 amax shoot them then reload. If you don't plan on going over 500yds 123 grain amax are fine if you go over 500 I would run 140 amax or 140 berger hybrid the higher BC makes a big difference I noticed this when I was shooting beside guys running heavier bullets & I had the 123 amax. In the wind 123 amax drift becomes apparent @ 600 yds. I run hodgen 4350 but would have to look up recipes. Hope this helps.
6.5 CM is awesome after having a 308 lol
Later