310 Cadet is is a very pleasant round, loads of fun - and accurate too! Reloading is ridiculously easy in that most rifles don't even need dies. Decap, seat primer, load powder, seat lubed bullet (with your fingers), done. As already said, 32-20 brass can be converted to work. I've done some pretty good work with it at 200yds, and I believe in I-don't-know-which-gun magazine, Ross seyfried once successfully tested one out to 500 or 600...
Original, non-converted ones in good shape are also collector items, steadily increasing in value. If you want to build something to make another rifle on the action, buy one that has already been messed with. I wouldn't use an original, unmodified one to build a rifle on.
Bullet mould - the best one(s) are sold by CBE in Oz. Lots of choice, very good quality and cast like a dream. Plus brass mould blocks won't rust...