rhartwell, are you aware of how easy it is to make cases for your rifle? Get your 7.65 Argentine dies and unscrew the decapping rod entirely, Lube up a 30-06 case and run it all the way into the die. This will leave you with a 7.65 case with an overly long neck which you can easily trim to the proper length. The two rounds use the same shell holder and they are pretty much identical in dimensions from the shoulder on down to the base. If your reloading manual
does not have 7.65 data 303 British data will work . Don't forget to use .311 diameter bullets. Happy shooting!