Need loads for 150 grain bullets in a 24 5/8" barrel. I am still using accuracy loads I developed with my first 300 win mag 40 years ago in 1970. IMR 4350 with the 150 grain bullets at 3450 fps. I haven't tried any of the newer powders with it so wondered if I was missing out on anything or if 4350 is still one of the best. RE-19 looks like a good one on paper to me. If anybody has some screamer loads with this combo let me know. Thinking about using this one on my dall sheep hunt. Scoped out it weighs 7.2 pounds so it is high on the list of suspects right now for the hunt.