I'm with Mike. If you just need few shells, the all-brass ".444/.410" works great. And you don't really need to be a full-setup reloader; a few simple DIY tools will do it. The components are harder to find than the tooling. And those .444s are like the old "Everlasting" shells!

(I even used my friend's monster Rockchucker press to make a few out of reformed .30-06 cases. Not worth the work....but they worked!).