You can always cast bullets. Molds are cheap and pretty effective, especially for hand guns.
I have a one 170gr mold that, in a pinch, can be used for my 30-30, .308 and .30-06. That is what you call multi-purpose.
I also have had trouble finding brass, but finally got enough for now.
Keep your powder dry my FRiend.
casting... eh... I don’t know. I don’t like the idea of lead fouling my very expensive barrels.