I sent you a message to see when it would be a good time to call and talkThe new /B chambers are the way to go and reamers, dies and brass are all in stock and should remain so. There are some top smiths who will have the reamers so you don't have to rent. Several smiths are listed on my website, But I would start with Axis Works in Tempe.
Call me anytime for info.
shermanwildcatcartridges.com