Thanks,, I have the CIP print; I can do all the conversions but the print gets pretty messy and hard to read/compare when done that way.
Actually, the Soviets "molested" the cartridge themselves- 6.5 Vostok. Target round, won the Olympic Biathlon at Innsbruck before the rules changed. They manufactured ammo for it back in the day... the rifles are pretty rare.
I have a print from Manson for it they had on file, need to go through it to see if anything is different other than being necked down from the original.
Should be quite accurate, but definitely a barrel burner. Performance I'm guessing somewhere between a .260 and 6.5-06.
Inexperienced with custom wildcats, necking down to 6.5 would no doubt be a "process".