Raimey,
I would anneal, size, trim, fireform, measure (trim if necessary), neck-size and load. Drop by the next time you get a chance. There is no telling where you might find some 5.5mm Berdan primers. With cases as rare as 6.5x70 R, everyone has to use whatever can be found. There is a way to convert 5.5mm Berdan primer pockets to .210" Boxer, but I haven't needed to try it. I think the best cases would be 6x70R, but I don't know of a reliable source.
Mike