Thanks for the kind words, Minerotago!
I do a lot of reloading and have acquired a few hundred of the new Hornady .455 MkII cases, which work just fine in this revolver .... (Notwithstanding being identified as .450, .476 and .455, the various British service revolver cartridges are in fact all .455's, actually .... which is certainly a blessing!)
Despite my indication in an earlier posting in this thread that I was delighted to learn that my Adams will chamber MkII .455 cartridges ... I have recently discovered that holds true for only five of the six chambers! Oh well ... I have developed the habit of just loading five chambers of a revolver, anyway ....