I measured my rifled choke tubes, the best I could.
They appear to be 0.730 in the grooves and ~ 0.715 on the lands (Really difficult to measure)
I feel relatively confident in the 0.730 measurement, the choke maker was able to confirm the 0.730
but could not give me any other measurements: " In 20 years we have never been asked this question"
I tried explaining that I was planning on using RB, well that just blew there minds.
"Why don't you just shoot sabots or bought ammo" some people don't get it.

So if I get it ! The concept it to seal the RB going down the barrel with a wad (Plastic or fibre)
have it spaced in the shell so the crimp holds it in, Have the RB be of sufficient diameter that the choke rifling engraves it and spins it, but without any excess constriction.
And voila you have a RB paradox bambi slayer.

Any benifit to using the paradox pointed bullits with 2 driving bands ?

Thanks for answering my questions so far.
I will take any advice for sources for any and all components.

Thanks!