No, that's good. Lead needs a higher velocity because it's going to lose its "umph" quicker than Hevi-Shot. Hevi-shot is more dense than lead anddoesn't slow down as much as lead resulting in more down-range energy. If you could shoot both lead and Hevi-shot at a target 40 yards away, with the lead shell going 1300 fps and the Hevi-Shot going 1090 fps, the Hevi-Shot would get to the target first and have more energy when it gets there.