I can my own corned beef hash. But I slow roast the corned beef brisket overnight first, and put it through a very rough grind before canning.

I suspect pressure canning brisket would tenderize it sufficiently. I would want to smoke it first, of course.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)