It's really not so obsolete. Graf & Sons sells the .30 Remington brass and it uses standard .308 diameter bullets. It can be loaded using 30-30 load data.
Here's the brass.
http://www.grafs.com/metallic/747 that brass is out of stock, try finding some. I have a friend on a project trying to make it out of 30.30 winchester due to it's unobtainium.
