500 RAFIKI

   RAFIKI means "FRIEND" is Swahili, but that is not the origin of the name for this cartridge. According to THE EXPLORA, it is a remake of the .500 No. 100 4-1/8", which was never produced. The rifle was requested by and named after Rafik Hariri, who was...

500 JEFFERY

From www.realguns.com it states: "The 500 Jeffery made its original appearance in the mid 1920's as the August Schüler Company's 12,7 x 70mm Schuler. As with a number of cartridges of German origin being offered between WWI and WWII, the round was renamed by the...