I've taken 14 deer in the last 5 seasons with mechanical broadheads and I've taken more than that in previous years using fixed broadheads. I do believe that with fixed blades you can get by using less poundage. I shoot mechanicals now and have my bow set at 65lbs. and get complete pass throughs most of the time. I did the same thing with fixed blades at 50 lbs draw weight. I've seen a lot more deer fall within 40 yards and easier to follow blood trails using mechanicals.