Seriously, just because you CAN do something doesn't mean you SHOULD do it.
A brass 45 acp case can be had for pennies.
Ever price replacement eyes or face?
The case is a gasket that must withstand thousands of pounds of pressure.
Sure, nothing happened... yet.
How much to repair your gun when the breech face or barrel gets flame cut?
Those aluminum cases were designed for single shooting, not reloading. Just because you CAN reload them doesn't mean you SHOULD reload them.
OK, so maybe I'm being a safety Nazi but really, I'm a tightwad, and I wouldn't reload aluminum cases unless I was desperate. Like, world-ending, invaded by enemies desperate.