I am currently carrying 124g hydrashocks in my Taurus 709 (Non +p rated). I am looking to change to something a bit more modern. After a bit of research I found a lot of data pointing to Federal 147g HST as a qualit round. My question though (Because I don't know much about ballistics) is this. From what I understand 147g rounds are slower then 115 and 124. Also, generally speaking the shorter the barrel the round is fired from the less velocity you get. Will a 147g round coming out of a 3 inch barrel have sufficent velocity to expand and penetrate?