I shot a mule deer buck in November at about 50-60 yards with a 140 gr RDF out of a 6.5 SAUM. The shot was quartering to, bullet entering in front of the shoulder. It went through the front of the rib cage near the sternum, tore through the heart and damaged the lungs. It did not make it to the other side of the ribcage. Given the shot angle and impact velocity, I figure that it performed pretty well.
