I don't care for the residue on the outside of the case using ACC#9 . I have found Acc 4100 / Ramshot Enforcer (the same) to work well when I couldn't find 2400 and the case was cleaner . They are just slightly slower in burn rate than 2400 but faster than W296/ H110 .
Then there's my " go to powder " for many years in the 41 when I wanted upper end velocity and top accuracy , IMR 4227 using a " full " magnum primer . I only shoot 2 cast bullet designs , the actual " Keith " 220 swc , HG 258 and Veral Smiths LBT LFN 210 . I cast them myself .