Anti, I've killed a pile of deer with homemade bows and arrows, but not with forged heads, (yet). Having an exit wound is vastly better than having the arrow remain in the deer. If you make a head 3/4 to 7/8" wide by about 2 3/4" long , weighing 125 - 175 grains, and get it really sharp, it will kill any deer in North America if properly placed in the vitals. Even with a 40# bow. By all means , have at it. John