Here is a photo of some recovered 455 bullets (they were 265 grs with a jacket and deep hollow base) that I had fired years ago into oak stumps. The Model 1915 Type 2 was chambered for the 455 Webley and used by the UK. Years ago I found that it was very difficult to reload the 455 cases and decided to rechamber my S&W to 45 Colt. Many of these revolvers were also rechambered to 45 ACP with clips. Not much accuracy with a jacket 450 dia bullet being fired down a 455 bore.
In an attempt to get a more accurate load, I took some 250 gr lead bullets that were 452 dia and made them into a hollow base which worked out. If you can find them. original 45 Colt 255 gr bullets are .454 dia and will work tooAttachment 99285