I've loaded 2 different 300 Win Mags, both Tikka T3s
Both seemed to like Hornady SST 180 grain bullets
I tried various powder in both. RL22, IMR7828, H4350, AA4350, IMR 4350, Hybrid 100V, and H4831SC.
One gun only seemed to like AA4350
The other liked H4350 and Hybrid 100V
Just a...