There are no free lunches because of the physics involved, and no one cartridge will be able to "do it all." Heck, I have tried to find the "one gun" solution all my life, and I can't do it even with my limited set of parameters.
I enjoy trying to find the perfect round but sure costs me a lot of money and butt chewings by my wife. Guess nothing is perfect. At least I’m not having to rely on a superior to give me something to carry into a fight. Wearing a uniform leaves you dancing with the girl that invited you to the dance.
“Heck, I have tried to find the “one gun” solution all my life, and I can’t do it even with my limited set of parameters.”
I have put thought and practice into the 1-gun solution as well. So much so that the criteria has boiled down to the an old west approach. The mission statement would reflect that like the “old west constraint” of 1 rifle, 1 pistol, 1 shotgun, plus the added carriage requirement of the trio being close at hand at all times. Boil it all down, distill it and abra-cadabrah - the magic trio would reveal itself... bottom line - it didn’t happen, unless the equation included geographical and situational constraints as well.