I can answer that. They can shoot heavy arrows (or any other arrow) more efficiently than a dual cam. As I am sure you know a solocam only loses about 1 fps for every 3 grains of arrow weight where a dual cam loses 1 fps for every 2 grains of arrow weight. In other words if you went from shooting a 350 gr. arrow to a 450 gr. arrow, you would loose 30-35 fps with a solocam and 40-50 with a dual cam.