No issues with .455 Webley ammo, it's made by Fiocchi, about 70 cents a round. Save your brass and reload it. Recoil is light, it's a good round for defense.
Don't get a Webley with a shaved cylinder for .45ACP, they really can't handle the hotter load.
The WWII model uses the .38S&W cartridge, no issues with ammo there, either.