One comment I recall from Hornady's manual on the .25 ACP was that reloading it "was not particularly rewarding" Typical powder charges were miniscule and the cases hard to handle.
Funny you should mention a .30-something. There is a .300 Rook here that needs shooting.
by accident I discovered I'd bought the rifle in this video:
I've loaded some 50 rounds with commercially available brass and bullets. I'm not terribly optimistic the bullets will go where aimed, as the Buffalo Bores are exactly .300 diameter. Need to slug the bore. If one could swage a 0 or 00 buck ball into a suitable bullet, seems it would be fairly cheap and faster than casting.
Not suggesting the .300 Rook case will be a good choice in the long term but maybe a variant of the .32-20, or a shortened .30 M1 carbine case, could be an economical case for such a round.
Typical powder charges were miniscule and the cases hard to handle. ![[Linked Image]](http://i712.photobucket.com/albums/ww127/tex_n_cal/rook_zps1ws5oa4i.jpg)
but maybe a variant of the .32-20, or a shortened .30 M1 carbine case, could be an economical case for such a round. 
