Hydra- i would use the one that will shoot a 5 shot group of 6" or less at your futhest distance ( 600 yards). usually it takes a little experimenting. i use 50.5 grain of varget, 168berger, lapua brass, 210M primer. loaded .030 off , in my 30-06s. i would for sure try a 168 CBT or a 168 accubond too.
