My rifle caliber "500 Jeffery" was built by Ritterbusch in Germany 1998. I use the terminology 500 Schüler or 12,7x70 Schüler because my cartridge is not a 500 Jeffery after the standardization from the beginning of the years 2000 , but a Romey Hybrid , a cartridge more or less similar to the cartridge 12,7x70 Schüler. This cartridge was also sold in the nineties by A-Square. I still have from this time factory ammo from Wolfgang Romey and shells from Horneber. http://www.cartridgecollector.net/500-jeffery We have strayed from the topic. The 500 jeffery is normally not a cartridge for a DR.