My buddy was shooting at a 360 class bull 50 yards away,As i sat and watched him draw back and release then suddenly the bull dropped like a ton of #####.We were all amazed he hit him right in the back of his head as he turned to run.I excited told him put another arrow into him quickly while he was laying stone dead on the ground,My buddy shot 7 more times as we walked up on the bull.Suddenly the bull stood and rockin back and forth as i said shoot and hit him again or he is goin to run off.As he ran back to his truck to refill his quiver,then bull stumbled back and forth.My buddy was so excited to almost have an elk down and me yelling at him put another one in him over and over,he couldnt finish the job,Finally the 13 arrow shot at this wounded bull hit him high in the guts an the bull ran off like he wasnt hurt at all with one arrow sticking out of his head and one out of his guts.TO make this story a little shorter,he run for 4 miles as we tracked him through the sage brush not leaving no blood.Finally we snuck up on him and he didnt miss the 14 th time and the bull went and died finally..His 80 pound bow shot 298 fps and his arrow bearly even cracked the big bulls skull.I guess it just knocked him out,Elk definetly no arrows goin to penetrate far enough to kill the elk IMO.Deer it would be a little easier but would stilll have to get lucky..So just be aware of the things that can happen if you wound him or never find him again.Later elknr