Accurate LT-32 and Shooters World Buffalo both work fairly well with cast bullets. Still pretty early for me to say more. Worth a try since RL7 and other powders are in short supply. In my 30-30, both are a little slower than 4198...maybe in the ballpark of H322? The LT-32 is extremely nice to handle, with small kernels. Buffalo is about like other extruded powders. Our experience with buffalo has been that it is somewhat slower than the 5744 that is supposedly similar or "the same". Both fill cases reasonably and should be useful for mid range cast rifle loads.