That is chambered in .38 s&w, it is a Hopkins & Allen 5 shot revolver that I
purchased very cheap from a gun show. H&A went out of business in 1917,
so it's at least 93 years old. I have not had time to clean & test it yet,
but I do have a box of Remington .38 S&W 146gr lrn when I get the time.
Btw, .38 S&W is NOT the same as .38 Spl ...(no insult intended) I am clearly
not an expert on revolvers as I have only owned 2 of them in my time! But,
I did some research on a gun that only cost me $45 that is in good shape
& is nickel plated with walnut grips. The .38S&W cartridge features a heavy
lead slug with a low velocity that will "kick butt" @ close range, but is much
weaker than a .38spl.