spitfires work very well even have shot some cotton tail rabbits out to 45 yards with the soft tissue of the rabbit and no problems opening longest shot on whitetail 67yards complete pass through on a 125 class 8pt 10 yard pile up have shot several whitetails with all complete pass throughs @ 74#s 340 grain arrow 27" draw and have got to see all game fall with in eyes view very happy for a color blind person