I think twice in my life ive needed more than one shot. The first time was with a CF miss. They are usually gone before i can cycle another round anyway. The second was with my ML after shooting another deer. Well i got the 2 with the ML no problem and i seldom get a shot past 100 yards.
A CF just does not offer me any real advantage. A deers heart and lungs can not seem to tell the difference and that is by far the place most of my shots end up.