I don't give a [bleep] about custom rifle builders, none of them use their own actions......
Wrong again. But keep going, you're batting a thousand.
The reason I mentioned custom rifle builders is, they have their pick and can use any action they want, including their own. They also need to turn out an accurate, high-quality product or they go out of business. Telling that they all use 2 lugs and sell their rifles for top dollar.