I'm going to get myself in trouble again. But..... if you use a modern compound bow withh 65-70 lbs of kinetic energy. A fixed blade broadhead doesn't stand a chance. Penetration has always been fixed blade users battle cry. Depending on the quality of mech head you use, you can out penetrate fixed blade. Accuracy, tuning and cutting diameter advantages are a given. Key is don't be cheap with broadhead.