I cast the chamber, leade and bore and got 0.365"

My next step is loading some of the RWS jacketed (nickel?) 190 grain bullets on hand from a purchase of NOS 9.3x72r components (these were sold in 50 bullet boxes by Old Western Scrounger at some point in the past).

I am also loading some paper patched 170 grain LRN bullets that are 0.358". I have the 9lb onion skin paper from Buffalo arms - I'm trying that paper as well as credit card receipt paper I collected while fueling our RV on this summer's trip to Colorado. The receipts wrap much more easily for me.

I'll explore molds and sizing dies if successful with the above.