I shoot zwickey eskimos 125 grains, with a 55-60 spined poc shaft, most of the time 5 1/2 shield cut feathers. Pretty standard for a wood arrow. They weight 515-525 grains, sometimes a little more sometimes a little less. From my 55# recurve or my 53# longbow they tend to be around 10grains per pound. The advantage to knowing the weight is consistant flight, of course with practice and good form. An efficient bow and a good matched set of arrows. Like widow sax said above the deer is worth the arrow, my arrows dont always get all the way thru but then they are still working as the animal is running. MM