I have seen this asked before. But can't remember what the conscience was. Ever since i started loading i have loaded by bullet weight charge weight and col. I never paid much attention to wether a bullet was jacketed or lead. I never never start near the top charge. Always work up. I have been cautioned not to switch data between jacketed and cast. I always thought that weight being equal that a jacketed bullet gave more resistance and thus higher pressure.
Am i wrong?
Does anyone else do this?