hillbill: brass is readily available from Starline and bullets are available from a couple of sources. The bore diameter of this round is .360-.361, not the .356-357 of the current 38 Special or 357 Magnum. The original load was a soft lead 200 grain round nose bullet at about 600'/sec; this load can be duplicated with 3.3 gns of Unique under a 200 gn slug.
If you intend to purchase this revolver check it over to make certain there are no bulges in the barrel. Some of these revolvers may have had slugs stuck in the barrel and may have had another fired on top of it - if this is one of those handguns it should not be fired.
The cartridge itself should not be considered a 38 special short - it simply isn't a 38 special. It is named the 38 Smith and Wesson in this country, or the 38 S&W. The British called this cartridge the 38/200 and felt it was the battlefield equivalent of their 455 Webley. This cartridge worked well for them until the Germans complained about its lethality at the Hague Convention (the 200 gn soft lead slug left unhealing wounds and massive tissue damage) so the bullet weight was reduced to 177 gns, and later to the current 146 gns.
I have used this cartridge. I can tell ya that the original loading is a hoot to shoot - so slow you can see it moving downrange when there is a fresh coat of snow on the ground, but do not doubt its lethality or its ability to 'whop' something. I think less of the 177 gn load and even less of the 146 gn load and should I ever again own a 38/200 the only load I would use is the original. JMTCW. Mikey.