I'm ready to go closer to full power loads in my SBH but I want a powder that will cover the range of loads better than H110/W296, which seem to me to be for full power loads only. Right now, my hunting load is 10 grs. of Unique over a 250 gr. cast SWC. I want something that I can shoot 240-250 SWC at a sedate pace but can be used to push these as well as the heavier, up to 300 gr., loads at close to the speeds developed by H110/W296. The three powders I've seen that seem close are 2400, H4227 and AA #9. Can anyone tell me which of these would meet my wants? Also, do all three require magnum primers? Thanks for the help!