SPersonivan is all over the map. The SBT rib strike would be oblique to the bone (ie: more of the bone's mass was in the missile path) whereas your theory would have the bullet strike the rib bone perpendicular (ie: very little bone in the missile path).
That is your take. The bullet would have struck JBC's rib somewhat obliquely and bent the rib inward before penetrating the bone. After all, it caused a fracture of the 5th rib near the spine and pentetrated the last 10 cm of rib.
So, better to believe your cockamamie theory that a bullet (unimpeded and nose-on) made a right-angle turn (3D will show this, plus it would have to traverse the shoulder cuff to reach the fifth rib at all) off the thin weak fifth rib bone.
There is no right angle turn. The cockamamie theory is the one that has the intact barely damaged bullet CE399 deflecting around the point of contact on the radius (instead of deflecting away from it), making a significant jagged tear in the cuff drawing threads into the wrist wound and then making a tiny, almost unnoticed, slit in the wrist on exit.
You expecting a punched-out clean silhouette of the bullet shape? Unlike the back, the wrist is going to move quite a bit when struck and the bullet would deflect. Not a simple matter of a bullet going through a stiff supported surface and leaving clean holes.
You do realize that the wrist cannot possibly move while the bullet is in contact with it. The time is too short. It is in contact with the wrist for a fraction of a millisecond.