A chamber cast is definitely the way to go. If it is the 8/57R/.360 it will be a bottleneck case but a smaller diameter than the 8x57IR. Both Brass & Dies are I believe available for it. The brass could also be made from shortened 9.3x72R cases. Power is I believe similar to the old .32-40 Ballard/Win in the smokeless loads. It should be suitable for taking a Whitetail with a well-placed shot. Even the black powder loading of the .32-40 took a pile of them in the past.

Should be a Fun Gun.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra