So i am one of many who are falling victim to the RL26 addiction and now, the shortage and I am looking at a different powder. From data i have seen on an unrelated post it showed that H1000 and Retumbo were right in the same wheelhouse on burn rate. Does this sound accurate? I am loading for my 300 WSM and 215gr Bergers. With RL26 I can get 2840fps with an ES of 19. Has anyone used H1000 or Retumbo in a WSM? I have had a decent amount of success with 7828ssc, it just produced slower velocities but may just go back to that. I'm getting a little tired of the constant wild goose chase for RL26.