Hello Adam,
For making brass from 30-30 or 32 Special you would have to trim rim to .422" and cut the extractor groove.
Yes, this would have to be done on a lathe. Why bother, Graf & Son's have .32 Remington Brass in stock.
https://www.grafs.com/retail/catalog...roductId/71103
As far as bullets, cheapest method would be a LEE C324-175-1R and size it to .321".
https://www.midwayusa.com/product/1010213717?pid=710529
AntiqueSledMan.