The 45 ACP bullet is very undersized. The Webley was made to shoot a hollow based bullet similar to a Minie ball. Once i had a single I'd no trouble buying 455 Colt ammo for it. I have obtained ~five hundred rounds loaded and which will previous me some time. https://gregoryazuqd.onesmablog.com/one-fired-45-acp-brass-an-overview-79310003