Originally Posted by SCmasterblaster
I wonder where they get all of their brass from?
They buy it in bulk, it's almost always mixed head stamp 55 gallon drums with 90000+/- cases(9mm).
There are brass processing machines that pressure check, split check, remove primer, prep primer pocket, and roll size to factory specs.
"Once fired" is an industry term, there is actually no way to be sure, that's why proper processing is so important.