Inputs the fps that gives the chronograph 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 0.39 0.40 Calculate 1 Joule = 328 FPS with 0.20bb grams328.1 FPS = 100 m/s