What was the exact purpose of the 9,3X82R? Was it a Berkard Behr Proprietary Loading? What game would the end user intend on chasing w/ the 9,3X82R?
Not proprietary. Also known as "Nimrod"-Patrone, because one of the name rights holder for the commercial name "Nimrod" also peddled such ammunition.
Was once rather common, now fairly rare. Had more powder space than the 9,3x72R cartridges (note plural, there are at least four), so its performance with black powder was a bit better. Nitro loads, for the very selfsame reason, are a bit more problematic. Generally, the same nitro load levels as for the 9,3x72 R are recommended.
Carcano