I beleave that shot selection is as/or more important than what you are going to shoot at the bear with(within reason).Shot in the right spot(lung/heart)a bear is pretty easy to kill.They don't seem to go as far as a deer shot in similar spots.Your bow of 50lbs is ampell.Any 2 or 3 bld cut on contact b-head that is very ,very sharp will do a good job in putting a bear down very quickly.Just remember to wait for the shot you want,and don't be dissapointed if the bear leaves without giving you a shot,he will most likely return in a few minutes,just wait him out.Bill