I'm interested in wildcats of this flavor also!
I do know that the Finns have a 9.3mm(.366") commercial cartridge that is a necked up 7.62x54r.....i don't have any info on it, but would like to know more. I have a few Hungarian Nagants that I want to turn into thumper carbines of either .35 or .36 caliber.
advntrjnky