Thank you Sir Ron. Technical aspects of the re-chamber dimensions are lacking in the article. There are some loads listed and a bit of the typical chatter on Lott recoil.

I have previously thought that a total of .458 to .460" of the existing parallel sided .4590" diameter free bore would put the Lott in a good spot. Thought .458" length was a cool number. But, then thought the .460" to ensure the proposed .458" length.