A few things that will give greater downrange speed are , small vane fletching , say 2" rather than feathers or quickspins or large area vanes like blazers , small diamater shafts , and light weight . But as allready stated these things are geared toward field target archery at long distance , for hunting these type of arrows are far from ideal . Give me alluminum shfts with 5" shield feathers and a cut on contact head , and the deer are in trouble , forget the speed , just hunt ............ or was that wind I forget .