I mentioned this to Hankins Rifle ages ago and he had no interest in making them. Glad Luke stepped up to the plate. The module system is far superior to reusing brass cases. The bolt head is already a .473 so its a super simple conversion.
This type of system is the rage right now for the non-smokers. It can handle extreme peak pressure with ease. You will never get close to those pressures with BH209. It was designed for applications into the 50kpsi range or a tad more.