I've recently acquired a 1915 Colt New Service in .455 and want to load up some ammunition for it. I'm just getting set up to reload and have a set of Lee dies on the way. I'll be using Fiocchi brass, but would like some input on what commercial bullets and powder to use. Am I correct in thinking that the Colt would do fine with slightly stouter loads up to the equivalent of .45 Colt pressures (255 grain bullet at 750-850fps possibly)? Also, are there certain proof marks that would indicate where and if this gun saw service in WW1? Thanks
Try the "British militaria Forums" on the net, has tons of info on reloading the 455 Webley cartridge. Their search engine is not good, but read the messages and you will learn a lot . Most people do use Lee dies and the RCBS 265 grain bul]et.