What caliber, and more importantly, what bullet do you shoot. It's hard to imagine not have a few DRTs even with lung shot with any bullets. Of the lung shot deer I've taken, I'd say about 50% have been DRT and the rest made it no more than 60 yards. I'm not sure why you haven't seen any DRT's with lung hits as I get them all the time and so do the rest of my buddies, but then again, we just shoot run of the mill cup and core ballistic tips, interlocks and core-lokts. We don't shoot copper bullets or partitions. The rest of my DRT's have been neck shots, shoulder shots (which also take out lungs) and one head shot. I'd say a DRT is a little more humane than having the animal 50-75 yards in a state of panic.
