Ten years ago, back when Krieger was selling barrel blanks in a Pope style rifled barrel, in multiple sizes of blanks, i.e. thickness, I, while on the phone, did a guestimate with the help and agreement of the Krieger person, on what thickness I would need for a barrel to be machined down to a barrel, with link, for a LAR Grizzly .458 caliber.
Sadly we would have been correct for a 1911 but it was too thin for a LAR Grizzly and I did not want to pay shipping and the extra cost for a different larger thickness blank; therefore I had a .458 barrel blank that was sitting in the closest. (It would have made a fantastic way to beat a burglar to death)
I was speaking with Jack Huntington who was now working on said same Grizzly, to bore it out to .475 for Wildey cartridges.
I told him of the blank.
In the same conversation, I told him I had a Herter's .44 Mag. that needed work as the cylinder pin was shot.
To make a long story short, (Jack LOVES doing oddball jobs) we decided to re-barrel and re-chamber the Herter's to .458.
Now I had/have .458 mag. cases that came in a collector cartridge lot I bought on-line, plus I would not have to deal with the size of the rims of .458 silhouette rounds.
It was going to be a longer case, but Jack found out that even opening the frame window, a 1.3 case would be the best size without seriously restricting the size, length, of bullet than can be used.
Also Jack has been fascinated by the old 1.3 rimless round as it was used in 'Nam years earlier, so that was the size we agreed on. (I knew there was not room for a 1.6 but I had told Jack to make it as long as possible, even if it was odd sized.)
I had, had a Bowen .445 Max. revolver that I had wanted Jack to take out to .500 Linebaugh Long, but Jack said that conversion, even with the frame already be a Bisley frame, would cost with-in a small amount the same as doing the Herter's, so I sold the Bowen Revolver and sent Jack the Herter's and the barrel.
Oddly, I sent the Herter's over a year after I sent the Grizzly but while Jack found the Grizzly interesting, which is why he agreed to do it, the Herter's piqued his interest more, and he admitted to me that the Herter's was worked on more than the Grizzly, although modifying the Grizzly magazines turned out to be a far, far, far greater problem than anyone had imagined but the Grizzly and Herter's are now very close to the same point of being finished.
I love to talk to Jack as you find out the smallest items are often the biggest obstacle.
Two years for he Herter's and approx. four for the Grizzly. (He finally had to send the magazines out to be micro-welded but this is one of those gents, who does work few do, that does the work when he feels like doing it, so when Jack gets the mags back he will send the Grizzly home to me.)
I would HIGHLY recommend Jack for any work one needs done.