H1000 works great in the 30-378, might not be the ideal burn rate but then I dont know if there is an ideal burn rate for this round. RL25 and VVN170 would be a second choice to try.
A friend of mine swears by VVN24N41 but he shoots 210gr VLD's
btw Never found Retumbo to be my favorite powder in anything I tried it in
Last edited by rockchuck828; 01/18/12.
