I have a rifle that belonged to my grandfather, it is manufactured by Wm Moore & Grey, 165 Piccadylly, London. On its right side is written Lee-Speed Patents, BSA Co, K593, on the barrel has proof marks and NITRO PROVED stamped. Its caliber is .303. I would like to know more about the rifle and the gunsmiths that made it. Thanks for the information you can give me.