AH, now I see!
One thing with a soft round ball, it tends to flaten. If it had exited there probly would have been a huge exit wound. I imagine that most of the power was expended getting through one side of the skull.
Just out of curiosity, was the brain pretty much mush?
Still, if I ever hunt deer with a cap and ball, it will be a Walker or Dragoon, probly with modified sights, and under 50 yards. I have project(if I can ever find the time to get started on it) of turning a walker into a carbine, should be good for short range deer. With a 60 grain load that aint far from my 45-70 loads, though a lot lighter projectile.
Wish someone make a replica of the old Colt revolving rifle.