There are videos of Apaches firing their 30 mm at humans in Iraq.
If someone can come up with a document proclaiming such that would be an argument ender.
It's like the folks who proclaim gun X or Y was designed just to wound and some told them that the military was taught to wound.
NO such documentary evidence has ever surfaced. What we do have are reports about how services deal with wounded and how many it takes. Never a document then saying because of that use gun Z to wound and shoot it to wound.