Rick,
Thanks for the info. The seller does not have dies and thinks that he may have "a cartridge or two". According to John Walter, the Lowenstein had a 26 deg shoulder. I will have to wait until I get the gun and take a chamber cast. I am hoping that RCBS will make a set of dies for me! According to Walter, Lowenstein was a California gunsmith who developed the cartridge in the 1950's. So maybe RCBS has the tooling for the dies. There was also a .224 Goldstein cartridge developed in the 1960's by a man of that name in the northeastern part of the US, and one developed in the same time frame in Australia that had a 30 deg neck.