I recently purchased a very nice British hammer cape gun. The seller advertised the rifle barrel as 500/450 BPE, 2 3/4"; aka the 450 No.1 Express. But when I took possession of the rifle, my Bertram 500/450 BPE brass stopped about a quarter inch short of being able to chamber. So I poured a chamber cast. The 500/450 is clearly the parent case. With the cartridge mouths lined up, the shoulders align too, but the body of my cartridge is about 1/4" shorter than that of the 500/450. Has anyone heard of a 500/450 with a 2 1/2" length? What would that caliber be called, and where can I find brass for it? Any help would be appreciated.
