cable,
The Buffalo Arms cases would be perfectly useable, they are a trusted source of hard to find cases and bullets.
If you had a lathe and the desire, there is no doubt you would quickly gain the knowledge to use it.
If you had your friend make up 50 cases, they should last the rest of your life; if you take care of them and are careful seating the bullets( the Hornet is infamous for buckling necks in seating the bullets). There is no doubt it will be easy to load ammo that is the ballistic equivalent of 22 magnum. If you use cast bullets, you should be easily able to duplicate 22 WRF or 22 LR ballistics. The case is so small that it is easy to "load it down" with out any filler, such as Kapok or Dacron and a wide range of powders would be useful( see above comment to Raimey).
Mike
