Steve, thanks for the reply. The chamber casting seems straight forward and the materials readily available, however, as to "slugging the barrel" I will need to some more research. The fact that the rifle has an "oval bore" rather than traditional rifling may be problematic.
Thanks for your reference to the Graeme Wright book and have it on my wish list.
As to reloading, I have the equipment to reload and presently reload numerous rifle, pistol and shotgun rounds. RCBS makes the dies for the caliber - pricy - but available.
As to straight wall cases that will require some research. The paper wrapped bullets is another issue if indeed the .500 uses them. I will no doubt acquire some loaded rounds to acquire some cases and for initial shooting.
