Originally posted by xia_emperor:
well what does it take to punch throuth an elk rib? KE (kenatic energy) I am more interasted in facts then personel feelings.
When i listed my 2 cents worth above, my opinion was based on experience with harvesting elk with a bow.....we've hung 37 elk on our meat pole over the last 16 years, and i've seen with my own eyes what happens when an arrow hits the rib cage....the age old dispute or debate of speed vs weight, and kinetic energy is still alive, and always will be i'm affraid... the "Facts" are hard to pin down as each shot placement and angle is different....the broad head plays a big part too.
the heavy arrow with a 2 blade broad head approach for traditional archers has proven very effective at short range..... as it should be... those broadheads are designed to slip between those ribs or split cartlage and small bones....
there isn't a bow out there that will penitrate a shoulder blade of an elk....i would highly recomend passing up a head on shot through those front ribs too....
the bottom line is you arrow dosn't have to have the power to break ribs...but your harvest rate will be much higher if you can.....how much KE does it take to break an elk rib? Hang a piece of 3/4 inch 7 lam plywood from a saw horse so it swings back and forth. if you can penitrate that plywood, you can break elk ribs. a stationary piece of plywood with a back stop dosen't simulate the give an actual rib cage has....
we did a broadhead test one year. i had a rib cage of a good sized bull elk i boned out in the field. we flopped the hide back over the rib cage and shot different stlyes of 3 blade heads into it....most of these were chisel head design....hands down...the 2 blade out performed the 3 blade when hitting a rib squarely. the 2 blade would actually split the rib, where the 3 blade with a chisel tip had more of a tendance to break the rib......we were all shooting compound bows in excess of 65 lbs though....
i have no experience with light weight bows at all...all i can say is if your set up is under 55-60 pounds.....let the force be with you, and only take quartering away shots less than 20 yards.....prayinmg a lot might help too....