"...shoot some big dogs, .30C ball, 223 sp...
I don't know (or care too much about) whatever argument with Hardball brought this up, but as you often mention, we "ain't in the military, and we ain't stuck with ball ammo"... Comparing fmj to sp ammo in tests is almost guaranteed to lead to skewed results.
A 110-grain hollowpoint or softpoint bullet @ 1950 fps, a load you've more than once called a "joke", has 200% of the mass, and 157% of the energy of the .356TSW you propound so often; so it means either you're not giving the .30C enough credit, or else the .356 is much less capable than a "joke" .30C as far as effectiveness on dogs, doesn't it...?
The .30C also has right at 300% of the energy of the old .32-20, which has taken tens of thousands of whitetail deer. The .32-20 shoots a 100-grain non-hp, cast lead bullet with 300-320 ft/lbs of energy, which according to your theories, just isn't sufficient for medium-to-large game animals. But it demonstrably has been, for over a century now.
A .223 sp, a .30C sp or hp, or even the .356, .357, etc would work on dogs; although I have no desire to demonstrate it for myself. I've cleanly taken game animals (deer down to coyote and fox) with .223, .308, and .357 magnum; almost all of them within 100-150 yards. I dare say the animals didn't know the difference between calibers.
Maybe I should start taking some game with the .30C's as well, just to document for 'non-believers'.