two thoughts:
- concentration! It matters, but can be hard to concentrate on targets, this is why spot shooting is hard, same shot over and over and over and over and over, one brain cramp, you drop points, out of the top spots!
- define dead on. By this I mean if you are target shooting, what are you shooting at? A 1 inch spot? then with a deer, what are you shooting at? It's an 8inch or so area, anywhere in there works, so maybe the 1 inch spot vs a dead deer, isn't the same measuring stick.