.35 cal bore, chambered with a 30-30, or 30-30IMP, then neck/throat reamed to the right dimensions for the case neck & bullet combination. It is the kind of thing that was used years ago in 'piecing together' a chamber for wildcats when having a specialty reamer wasnt readily available for a notion. If you have, or can get the proper reamers its an option.
Seems somewhere recently I was just reading about something like a 30-40Krag case run into a 35Rem die to make a 35Krag??? If so, you could run a 35Rem chamber reamer after the Krag reamer to do a similar thing. I will see if I can figure out where.
Or just do the Herritt and keep it simple.........