I once shot a small deer, about 110 lbs. at most, through the heart and lungs with a 12 gauge slug. I thought I missed it as it took off with a bound and a full blown run, but I found a few drops of blood. I later found it about 125 yards away from where I had shot it. When I field dressed it here is what I found: At least 1/4 to as much as 1/3 of the heart was blow away (not there at all - no aorta present no heart from the surrounding area of the aorta for 1/4 to 1/3 the size of the whole heart - in other words a devastating wound), most of the left lung was the consistency of oatmeal (easily more than 50 percent of it, more like 75 percent), the right lung was about 15 to 25 percent like oatmeal. Rib cage smashed with splintered bone evident. Other trauma to soft body parts as would be expected.
Now are you going to tell me that it was the fault of the 12 gauge round that allowed this animal to run 125 yards from where I shot it because if you are then you don't know jack <font color=red>*</font><font color=red>*</font><font color=red>*</font><font color=red>*</font>! The things that allowed the animal to get as far as it did were probably, for the most part, stored energy and muscle memory. I doubt that any rifle round out there with the exception of some of the very large calibers would have done the amount of damage that this 12 slug had done. This animal was able to run like that not because of any lack on the part of the 12 gauge slug (the wound was an absolutely devastating kill shot), but because of attributes of the deer itself. Any good hit to a vital area with a 12 gauge slug from an appropriate range is likely to be a kill shot, it is a perfectly fine deer round. Why not take your head out of the clouds sometime, and come down to earth.