I am in the process of acquiring a Charles Lancaster double rifle. The rifle barrels flats are marked 500 EX 3" CASE 115 G** N*6 (asterisks indicate unreadable text). I only have pictures and the proof marks are not clear. The serial number is 7421. I am trying trying to find out more about the gun and could use some help. The 500 express apparently can be loaded in black powder, nitro for black powder and nitro express. I am woefully ignorant about English guns in general and since I don't have the rifle in hand and cannot verify the proof marks. I would welcome any and all information this forum could offer. Thanks in advance. Doug K
