(hit rib on entry) and a fist sized hole on the exit. These are coming from a 300 RUM though.
I had the same experience last year when the bullet hit a rib. Good expansion with some palm sized exit holes.
This thread is old but here are some antelope damage pictures with the 230 Target shot from a RUM.
http://www.longrangehunting.com/forums/f17/rl-33-first-blood-122542/