I took my recently refurbished 25-year-old Reflex Xtreme to the range to try it out: I clocked 425-grain arrows at an average of 245 fps, which equates to 56.57 ft-lbs of kinetic energy and .46 slug-fps of momentum.
In other words, it was hitting pretty hard. Not grizzly bear or Cape Buffalo hard, but certainly enough to dispatch the stoutest of zombies.
