So how is is not reacting to being shot in the torso at z230?
It is simply imprecise. JBC described how he remembered reacting to being shot and the frame he believed he was struck at. What he didn't recall was his immediate initial reflexive and involuntary response when he flipped his injured right arm in reaction to having his wrist shattered. He wasn't even aware of his wrist injury until he came out of surgery.
JBC believed he was facing straight ahead when he was hit by the second shot and looking at the Z-film frames, he saw he reached that forward facing position at Z230, The Z-film actually shows he was hit about a half second earlier as evidenced by the jacket bulge at Z224 and the arm flip which began att Z226.