Sorry but your theory is wrong, at least based on actual test data. Mine opinion isnt based on theory of sectional density, its based on actual penatration tests in a wet newpaper medium.

30.06 165 grain swift a frame 2850fps
19.3 inches of penetration
.670 inch diameter wound channel

7 rm mag 160 grain swift a frame(higher sectional density!) 2930fps
12.8 inches penetration
.652 in diameter wound channel

Honestly, i dont think there is really that much difference between these two cartridges, the 30.06 has a slight edge, but either are great for all around deer/elk use. The point i was trying to make is that sectional density and kinetic energy numbers dont always correlate to actual performance.

terminal ballistics

One of the things i like best about the above site is the graphs showing the same bullet hitting the medium at different velocities, and penatration going down as velocity goes up. It also has charts showing wound channel shapes for different velocities and different bullets and calibers. Really a good read. Debunks a lot of popular theories about bullet performance, at least it does for me. It really shows the performance differences between standard bullets and premiums. Takes a long time to get through it all, but its well worth it. It also pretty much agrees with a lot of what i read from professional hunters in africa who witness bullet performance more in one season than most of us have a chance to in a lifetime of hunting here in the states.