My grandfather shot a deer 2 yrs ago with a mechanical broadhead and a bow set at 50lbs. Was not pleased at all with the penetration or the damage but like they say, hit them in the right spot and they'll go down.He still shoots a mechanical but idisagree. Iwould recommend afixed blade. In my opinion thereare to many things to worry about witha low poundage like that and the kinetic energy being used to just open the blades. With a fixed broadhead more of your energy will be put towards knock down power and you know what your getting.