Thanks guys, for your fine comments.
I once had another MK Vl, very similar, but I also had at least two 44 magnums and a 357 at the same time, so I sold the Webley. Now, I appreciate the Webley more and its history.
I did reload for the Webley when I had the other one, and yes, I am going to reload for this one. I can't find any notes from before, but I will use a fast powder and the chronograph, to keep the loads low.
If anyone is reloading for the .455 Webley I would appreciate seeing what your load is.
Bruce