I have a Cabelas Hawkens, have come to realize that it wants to shoot round balls instead of conicals.

I have found that my most accurate load is a 50cal round ball with 80 grains pyrodex. Does anyone on the board shoot a similar load, or can anyone tell me if this load has enough energy to be effective for whitetail deer hunting? I would also like any recommendations on where to aim in order to put the deer down quickly.

Thanks,
Rick C.