Trade-Ex DOES have the 6.5x53é4 Mannlicher-Schoenauer brass you need... in nice big bags and at a reasonable price.
Or, if you really wanted to, you could fireform Carcano brass (also available from Trade-Ex).
OR you could go the Swift route as described: it works. I used it for Carcano brass myself before Anthony started bringing in the Partizan stuff (which is really decent brass).
You can also make it up from all those heaps of .303 Savage empties that litter the landscape. Here, you turn the rim off, cut an exractor groove, anneal the front of the case and FL size in your MS dies, then load, fire-form and reload.
Or, if you rillyreallyREALLY want to do a lot of work, you can make it from .308 Winchester by FL sizing with a SB die, then opening the case-mouth, annealing the thing, then re-drawing the casing to a base diameter of .442, cleaning up and recutting the extractor groove, then a FL sizing and trimming to length, then loading.
If you have just TONS of money to waste, you can make it up from .50 BMG brass by following the above recipe (just mightily expanded, mind you).
Me, I would just click the gray-tan Trade-Ex link at the top of this page (10 o`clock from the world-famed CGN Beaver) and order a few bags of proper MS brass.
As always, your choice.
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