Hi! Thank you, I slugged the bore, and made a cast. Bore is 9,30-9,34mm, chamber is slightly larger, rim - 12,5mm,base-11mm, I think is 9.3x72r-D. I am waiting for die sets but it can take few months.I got 13,2g. 366 round nose bullets and old type 72U 14,9g flat nose . 364 with .375 driving band/stopping ring. I was thinking to load 14,9g bullets with black powder. I do have challenger press, factory crimping dies, many load data. If you have any sugestions, information, please let mé know. Ánd once more Thank you.