Do you live in NY, NJ, CA or other repressed place?
Please stop using the term "high cap". It is a legislated term and only vinidicates the antigunners position when we use it - "Hey [wife/SO/friend], look here at this gun forum. Even those gunnies there realize those guns hold more bullets than necessary!"
You have "designed capacity". No inventor sits down and decides to design a "low cap" or "high cap" gun. Designers meld the best design with the appropriate cartridge capacity.
IOW, Congress can pass a law that says dogs are now cats, but I doubt the dogs are gonna learn to meow.