Although it's anecdotal, a coroner posted on the thread I started on another forum.
"I've got a single case of RIP G2 vs an actual human. Skinny guy, about 120lb, shot just behind the shoulder with the .40 version.
Entrance defect in the skin had the "gear wheel" outline (similar to a BFL) that you'd expect. The bullet started expanding on its way through the chest wall, left a 1.5 inch hole as it entered the pleural cavity. The 8 trocars broke off, making 9 seperate pathways through the lung, with a spread of about 2.75 inches.
The base and one trocar managed to exit his skinny chest; the other 7 either embedded themselves into the inner surface of the sternum or stopped in the muscle of the chest wall under the skin. The total penetration of those trocars was 8 inches."