The .35 rem's parent case is actually some kind of odd obsolete European cartridge whose name I can't recall at the moment. But anyway it would be MUCH harder to find that than .35 rem brass so it doesn't really matter. The .35 cannot be made from any other family's case because it has a .460 diameter case head which is different than everything else. .308,'06 and some others are .473
Forming .35 Rem:
http://castboolits.gunloads.com/sho...buy-or-re-form&p=320637&viewfull=1#post320637