Im normally not very detailed as far as speed and KE. I have usedsetups with MUCHLESS over the years and they worked just fine granted the shots were good ones. I have killed plenty of deer and know what works for me. BUT, at the recent G2G, MECHDOC brung his crono, grain scale, poundage scale and we played with it a bit. I had no idea what my bow was shooting but i know now. I had two sets of arrows so i tested both and was surprised at the difference in speed with the different grain weights. I have the weights wrote down but here is what im thinking they were. With my victory arrows at 354 grains and bow maxed out i was shooting 301 fps. with my other arrows weighing in at 401 grains i was shooting 274 fps. Ill most likely go the heavier arrows for deer hunting. I can see myself buying some more toys