Way off topic, for European members.
 

I recently aquired a beautiful old single shot German stalking rifle.

It was made by W.Collath of Frankfurt. The problem is that it's in
9.3X65R Collath caliber.

If any of the European members could provide me with any information on specifications, loading data, component data, etc. I would be forever grateful.I am going to try to fabricate ammunition for it.
Thanks, Ron

thanks Tac... perhaps you or someone who is reading this has an illustration of the dimensions of the case for the ammunition in question that could be posted here for Ron Smith's reference as he looks for a cartridge case he could use as the basis for this caliber?

Tac, I appreciate the information, none the less. I will be doing a chamber cast this weekend.

Thanks, Ron