I have a Win mod 70 in 300WSM & have worked up 2 different loads that are equal to or slightly better than factory. The first is with a 180 gr fail safe with RL 19. I killed Bison, black bear & mule deer with this load. The second is a 165 gr Swift Aframe also with RL 19. I took this load on a dall sheep hunt but wasn't fortunate enough to kill one. I use Norma brass & CCI mag primers. While working up loads for this my gun seems to shoot better as the loads get hotter.