Well all I have to say is that I shoot 300fps and medium weight arrows (Carbon Express 300' s 26-1/2" long & 100 Gr broad head). I have taken 4 large Elk with this set up and all were complete pass throughs. I have no problems with penatration or accuracy. I will add that at those speeds I have gone to a mechanical broad head. Traditional bladed broad heads seem to wonder for me at this speed.